Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Vijay Bellur]

I tried this configuration on my local setup and the test passed fine.

Adding the fuse and write-behind maintainers in Gluster to check if they
are aware of any oddities with using mmap & fuse.

Thanks,
Vijay

On Tue, Mar 19, 2019 at 2:21 PM Jim Kinney  wrote:

> Volume Name: home
> Type: Replicate
> Volume ID: 5367adb1-99fc-44c3-98c4-71f7a41e628a
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 1 x 2 = 2
> Transport-type: tcp,rdma
> Bricks:
> Brick1: bmidata1:/data/glusterfs/home/brick/brick
> Brick2: bmidata2:/data/glusterfs/home/brick/brick
> Options Reconfigured:
> performance.client-io-threads: off
> storage.build-pgfid: on
> cluster.self-heal-daemon: enable
> performance.readdir-ahead: off
> nfs.disable: off
>
>
> There are 11 other volumes and all are similar.
>
>
> On Tue, 2019-03-19 at 13:59 -0700, Vijay Bellur wrote:
>
> Thank you for the reproducer! Can you please let us know the output of
> `gluster volume info`?
>
> Regards,
> Vijay
>
> On Tue, Mar 19, 2019 at 12:53 PM Jim Kinney  wrote:
>
> This python will fail when writing to a file in a glusterfs fuse mounted
> directory.
>
> import mmap
>
> # write a simple example file
> with open("hello.txt", "wb") as f:
> f.write("Hello Python!\n")
>
> with open("hello.txt", "r+b") as f:
> # memory-map the file, size 0 means whole file
> mm = mmap.mmap(f.fileno(), 0)
> # read content via standard file methods
> print mm.readline()  # prints "Hello Python!"
> # read content via slice notation
> print mm[:5]  # prints "Hello"
> # update content using slice notation;
> # note that new content must have same size
> mm[6:] = " world!\n"
> # ... and read again using standard file methods
> mm.seek(0)
> print mm.readline()  # prints "Hello  world!"
> # close the map
> mm.close()
>
>
>
>
>
>
>
> On Tue, 2019-03-19 at 12:06 -0400, Jim Kinney wrote:
>
> Native mount issue with multiple clients (centos7 glusterfs 3.12).
>
> Seems to hit python 2.7 and 3+. User tries to open file(s) for write on
> long process and system eventually times out.
>
> Switching to NFS stops the error.
>
> No bug notice yet. Too many pans on the fire :-(
>
> On Tue, 2019-03-19 at 18:42 +0530, Amar Tumballi Suryanarayan wrote:
>
> Hi Jim,
>
> On Tue, Mar 19, 2019 at 6:21 PM Jim Kinney  wrote:
>
>
> Issues with glusterfs fuse mounts cause issues with python file open for
> write. We have to use nfs to avoid this.
>
> Really want to see better back-end tools to facilitate cleaning up of
> glusterfs failures. If system is going to use hard linked ID, need a
> mapping of id to file to fix things. That option is now on for all exports.
> It should be the default If a host is down and users delete files by the
> thousands, gluster _never_ catches up. Finding path names for ids across
> even a 40TB mount, much less the 200+TB one, is a slow process. A network
> outage of 2 minutes and one system didn't get the call to recursively
> delete several dozen directories each with several thousand files.
>
>
>
> Are you talking about some issues in geo-replication module or some other
> application using native mount? Happy to take the discussion forward about
> these issues.
>
> Are there any bugs open on this?
>
> Thanks,
> Amar
>
>
>
>
> nfs
> On March 19, 2019 8:09:01 AM EDT, Hans Henrik Happe  wrote:
>
> Hi,
>
> Looking into something else I fell over this proposal. Being a shop that
> are going into "Leaving GlusterFS" mode, I thought I would give my two
> cents.
>
> While being partially an HPC shop with a few Lustre filesystems,  we chose
> GlusterFS for an archiving solution (2-3 PB), because we could find files
> in the underlying ZFS filesystems if GlusterFS went sour.
>
> We have used the access to the underlying files plenty, because of the
> continuous instability of GlusterFS'. Meanwhile, Lustre have been almost
> effortless to run and mainly for that reason we are planning to move away
> from GlusterFS.
>
> Reading this proposal kind of underlined that "Leaving GluserFS" is the
> right thing to do. While I never understood why GlusterFS has been in
> feature crazy mode instead of stabilizing mode, taking away crucial
> features I don't get. With RoCE, RDMA is getting mainstream. Quotas are
> very useful, even though the current implementation are not perfect.
> Tiering also makes so much sense, but, for large files, not on a per-file
> level.
>
> To be honest we only use quotas. We got scared of trying out new
> performance features that potentially would open up a new back of issues.
>
> Sorry for being such a buzzkill. I really wanted it to be different.
>
> Cheers,
> Hans Henrik
> On 19/07/2018 08.56, Amar Tumballi wrote:
>
>
> * Hi all, Over last 12 years of Gluster, we have developed many features,
> and continue to support most of it till now. But along the way, we have
> figured out better methods of doing things. Also we are not actively
> maintaining some of these features. We are now thinking of cleaning up

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Vijay Bellur]

Thank you for the reproducer! Can you please let us know the output of
`gluster volume info`?

Regards,
Vijay

On Tue, Mar 19, 2019 at 12:53 PM Jim Kinney  wrote:

> This python will fail when writing to a file in a glusterfs fuse mounted
> directory.
>
> import mmap
>
> # write a simple example file
> with open("hello.txt", "wb") as f:
> f.write("Hello Python!\n")
>
> with open("hello.txt", "r+b") as f:
> # memory-map the file, size 0 means whole file
> mm = mmap.mmap(f.fileno(), 0)
> # read content via standard file methods
> print mm.readline()  # prints "Hello Python!"
> # read content via slice notation
> print mm[:5]  # prints "Hello"
> # update content using slice notation;
> # note that new content must have same size
> mm[6:] = " world!\n"
> # ... and read again using standard file methods
> mm.seek(0)
> print mm.readline()  # prints "Hello  world!"
> # close the map
> mm.close()
>
>
>
>
>
>
>
> On Tue, 2019-03-19 at 12:06 -0400, Jim Kinney wrote:
>
> Native mount issue with multiple clients (centos7 glusterfs 3.12).
>
> Seems to hit python 2.7 and 3+. User tries to open file(s) for write on
> long process and system eventually times out.
>
> Switching to NFS stops the error.
>
> No bug notice yet. Too many pans on the fire :-(
>
> On Tue, 2019-03-19 at 18:42 +0530, Amar Tumballi Suryanarayan wrote:
>
> Hi Jim,
>
> On Tue, Mar 19, 2019 at 6:21 PM Jim Kinney  wrote:
>
>
> Issues with glusterfs fuse mounts cause issues with python file open for
> write. We have to use nfs to avoid this.
>
> Really want to see better back-end tools to facilitate cleaning up of
> glusterfs failures. If system is going to use hard linked ID, need a
> mapping of id to file to fix things. That option is now on for all exports.
> It should be the default If a host is down and users delete files by the
> thousands, gluster _never_ catches up. Finding path names for ids across
> even a 40TB mount, much less the 200+TB one, is a slow process. A network
> outage of 2 minutes and one system didn't get the call to recursively
> delete several dozen directories each with several thousand files.
>
>
>
> Are you talking about some issues in geo-replication module or some other
> application using native mount? Happy to take the discussion forward about
> these issues.
>
> Are there any bugs open on this?
>
> Thanks,
> Amar
>
>
>
>
> nfs
> On March 19, 2019 8:09:01 AM EDT, Hans Henrik Happe  wrote:
>
> Hi,
>
> Looking into something else I fell over this proposal. Being a shop that
> are going into "Leaving GlusterFS" mode, I thought I would give my two
> cents.
>
> While being partially an HPC shop with a few Lustre filesystems,  we chose
> GlusterFS for an archiving solution (2-3 PB), because we could find files
> in the underlying ZFS filesystems if GlusterFS went sour.
>
> We have used the access to the underlying files plenty, because of the
> continuous instability of GlusterFS'. Meanwhile, Lustre have been almost
> effortless to run and mainly for that reason we are planning to move away
> from GlusterFS.
>
> Reading this proposal kind of underlined that "Leaving GluserFS" is the
> right thing to do. While I never understood why GlusterFS has been in
> feature crazy mode instead of stabilizing mode, taking away crucial
> features I don't get. With RoCE, RDMA is getting mainstream. Quotas are
> very useful, even though the current implementation are not perfect.
> Tiering also makes so much sense, but, for large files, not on a per-file
> level.
>
> To be honest we only use quotas. We got scared of trying out new
> performance features that potentially would open up a new back of issues.
>
> Sorry for being such a buzzkill. I really wanted it to be different.
>
> Cheers,
> Hans Henrik
> On 19/07/2018 08.56, Amar Tumballi wrote:
>
>
> * Hi all, Over last 12 years of Gluster, we have developed many features,
> and continue to support most of it till now. But along the way, we have
> figured out better methods of doing things. Also we are not actively
> maintaining some of these features. We are now thinking of cleaning up some
> of these ‘unsupported’ features, and mark them as ‘SunSet’ (i.e., would be
> totally taken out of codebase in following releases) in next upcoming
> release, v5.0. The release notes will provide options for smoothly
> migrating to the supported configurations. If you are using any of these
> features, do let us know, so that we can help you with ‘migration’.. Also,
> we are happy to guide new developers to work on those components which are
> not actively being maintained by current set of developers. List of
> features hitting sunset: ‘cluster/stripe’ translator: This translator was
> developed very early in the evolution of GlusterFS, and addressed one of
> the very common question of Distributed FS, which is “What happens if one
> of my file is bigger than the available brick. Say, I have 2 TB hard drive,
> exported in glusterfs, my file is 

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Amar Tumballi Suryanarayan]

Hi Jim,

On Tue, Mar 19, 2019 at 6:21 PM Jim Kinney  wrote:

>
> Issues with glusterfs fuse mounts cause issues with python file open for
> write. We have to use nfs to avoid this.
>
> Really want to see better back-end tools to facilitate cleaning up of
> glusterfs failures. If system is going to use hard linked ID, need a
> mapping of id to file to fix things. That option is now on for all exports.
> It should be the default If a host is down and users delete files by the
> thousands, gluster _never_ catches up. Finding path names for ids across
> even a 40TB mount, much less the 200+TB one, is a slow process. A network
> outage of 2 minutes and one system didn't get the call to recursively
> delete several dozen directories each with several thousand files.
>
>
Are you talking about some issues in geo-replication module or some other
application using native mount? Happy to take the discussion forward about
these issues.

Are there any bugs open on this?

Thanks,
Amar


>
>
> nfs
> On March 19, 2019 8:09:01 AM EDT, Hans Henrik Happe  wrote:
>>
>> Hi,
>>
>> Looking into something else I fell over this proposal. Being a shop that
>> are going into "Leaving GlusterFS" mode, I thought I would give my two
>> cents.
>>
>> While being partially an HPC shop with a few Lustre filesystems,  we
>> chose GlusterFS for an archiving solution (2-3 PB), because we could find
>> files in the underlying ZFS filesystems if GlusterFS went sour.
>>
>> We have used the access to the underlying files plenty, because of the
>> continuous instability of GlusterFS'. Meanwhile, Lustre have been almost
>> effortless to run and mainly for that reason we are planning to move away
>> from GlusterFS.
>>
>> Reading this proposal kind of underlined that "Leaving GluserFS" is the
>> right thing to do. While I never understood why GlusterFS has been in
>> feature crazy mode instead of stabilizing mode, taking away crucial
>> features I don't get. With RoCE, RDMA is getting mainstream. Quotas are
>> very useful, even though the current implementation are not perfect.
>> Tiering also makes so much sense, but, for large files, not on a per-file
>> level.
>>
>> To be honest we only use quotas. We got scared of trying out new
>> performance features that potentially would open up a new back of issues.
>>
>> Sorry for being such a buzzkill. I really wanted it to be different.
>>
>> Cheers,
>> Hans Henrik
>> On 19/07/2018 08.56, Amar Tumballi wrote:
>>
>>
>> * Hi all, Over last 12 years of Gluster, we have developed many features,
>> and continue to support most of it till now. But along the way, we have
>> figured out better methods of doing things. Also we are not actively
>> maintaining some of these features. We are now thinking of cleaning up some
>> of these ‘unsupported’ features, and mark them as ‘SunSet’ (i.e., would be
>> totally taken out of codebase in following releases) in next upcoming
>> release, v5.0. The release notes will provide options for smoothly
>> migrating to the supported configurations. If you are using any of these
>> features, do let us know, so that we can help you with ‘migration’.. Also,
>> we are happy to guide new developers to work on those components which are
>> not actively being maintained by current set of developers. List of
>> features hitting sunset: ‘cluster/stripe’ translator: This translator was
>> developed very early in the evolution of GlusterFS, and addressed one of
>> the very common question of Distributed FS, which is “What happens if one
>> of my file is bigger than the available brick. Say, I have 2 TB hard drive,
>> exported in glusterfs, my file is 3 TB”. While it solved the purpose, it
>> was very hard to handle failure scenarios, and give a real good experience
>> to our users with this feature. Over the time, Gluster solved the problem
>> with it’s ‘Shard’ feature, which solves the problem in much better way, and
>> provides much better solution with existing well supported stack. Hence the
>> proposal for Deprecation. If you are using this feature, then do write to
>> us, as it needs a proper migration from existing volume to a new full
>> supported volume type before you upgrade. ‘storage/bd’ translator: This
>> feature got into the code base 5 years back with this patch
>> [1]. Plan was to use a block device
>> directly as a brick, which would help to handle disk-image storage much
>> easily in glusterfs. As the feature is not getting more contribution, and
>> we are not seeing any user traction on this, would like to propose for
>> Deprecation. If you are using the feature, plan to move to a supported
>> gluster volume configuration, and have your setup ‘supported’ before
>> upgrading to your new gluster version. ‘RDMA’ transport support: Gluster
>> started supporting RDMA while ib-verbs was still new, and very high-end
>> infra around that time were using Infiniband. Engineers did work with
>> Mellanox, and got the technology into GlusterFS for bett

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Amar Tumballi Suryanarayan]

Hi Hans,

Thanks for the honest feedback. Appreciate this.

On Tue, Mar 19, 2019 at 5:39 PM Hans Henrik Happe  wrote:

> Hi,
>
> Looking into something else I fell over this proposal. Being a shop that
> are going into "Leaving GlusterFS" mode, I thought I would give my two
> cents.
>
> While being partially an HPC shop with a few Lustre filesystems,  we chose
> GlusterFS for an archiving solution (2-3 PB), because we could find files
> in the underlying ZFS filesystems if GlusterFS went sour.
>
> We have used the access to the underlying files plenty, because of the
> continuous instability of GlusterFS'. Meanwhile, Lustre have been almost
> effortless to run and mainly for that reason we are planning to move away
> from GlusterFS.
>
> Reading this proposal kind of underlined that "Leaving GluserFS" is the
> right thing to do. While I never understood why GlusterFS has been in
> feature crazy mode instead of stabilizing mode, taking away crucial
> features I don't get. With RoCE, RDMA is getting mainstream. Quotas are
> very useful, even though the current implementation are not perfect.
> Tiering also makes so much sense, but, for large files, not on a per-file
> level.
>
>
It is a right concern to raise, and removing the existing features is not a
good thing most of the times. But, one thing we noticed over the years is,
the features which we develop, and not take to completion cause the major
heart-burn. People think it is present, and it is already few years since
its introduced, but if the developers are not working on it, users would
always feel that the product doesn't work, because that one feature didn't
work.

Other than Quota in the proposal email, for all other features, even though
we have *some* users, we are inclined towards deprecating them, considering
projects overall goals of stability in the longer run.


> To be honest we only use quotas. We got scared of trying out new
> performance features that potentially would open up a new back of issues.
>
> About Quota, we heard enough voices, so we will make sure we keep it. The
original email was 'Proposal', and hence these opinions matter for decision.

Sorry for being such a buzzkill. I really wanted it to be different.
>
> We hear you. Please let us know one thing, which were the versions you
tried ?

We hope in coming months, our recent focus on Stability and Technical debt
reduction will help you to re-look at Gluster after sometime.


> Cheers,
> Hans Henrik
> On 19/07/2018 08.56, Amar Tumballi wrote:
>
>
> * Hi all, Over last 12 years of Gluster, we have developed many features,
> and continue to support most of it till now. But along the way, we have
> figured out better methods of doing things. Also we are not actively
> maintaining some of these features. We are now thinking of cleaning up some
> of these ‘unsupported’ features, and mark them as ‘SunSet’ (i.e., would be
> totally taken out of codebase in following releases) in next upcoming
> release, v5.0. The release notes will provide options for smoothly
> migrating to the supported configurations. If you are using any of these
> features, do let us know, so that we can help you with ‘migration’.. Also,
> we are happy to guide new developers to work on those components which are
> not actively being maintained by current set of developers. List of
> features hitting sunset: ‘cluster/stripe’ translator: This translator was
> developed very early in the evolution of GlusterFS, and addressed one of
> the very common question of Distributed FS, which is “What happens if one
> of my file is bigger than the available brick. Say, I have 2 TB hard drive,
> exported in glusterfs, my file is 3 TB”. While it solved the purpose, it
> was very hard to handle failure scenarios, and give a real good experience
> to our users with this feature. Over the time, Gluster solved the problem
> with it’s ‘Shard’ feature, which solves the problem in much better way, and
> provides much better solution with existing well supported stack. Hence the
> proposal for Deprecation. If you are using this feature, then do write to
> us, as it needs a proper migration from existing volume to a new full
> supported volume type before you upgrade. ‘storage/bd’ translator: This
> feature got into the code base 5 years back with this patch
> [1]. Plan was to use a block device
> directly as a brick, which would help to handle disk-image storage much
> easily in glusterfs. As the feature is not getting more contribution, and
> we are not seeing any user traction on this, would like to propose for
> Deprecation. If you are using the feature, plan to move to a supported
> gluster volume configuration, and have your setup ‘supported’ before
> upgrading to your new gluster version. ‘RDMA’ transport support: Gluster
> started supporting RDMA while ib-verbs was still new, and very high-end
> infra around that time were using Infiniband. Engineers did work with
> Mellanox, and got the technol

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Amar Tumballi]

On Mon, Jul 23, 2018 at 8:21 PM, Gudrun Mareike Amedick <
g.amed...@uni-luebeck.de> wrote:

> Hi,
>
> we're planning a dispersed volume with at least 50 project directories.
> Each of those has its own quota ranging between 0.1TB and 200TB. Comparing
> XFS
> project quotas over several servers and bricks to make sure their total
> matches the desired value doesn't really sound practical. It would probably
> be
> possible to create and maintain 50 volumes and more, but it doesn't seem
> to be a desirable solution. The quotas aren't fixed and resizing a volume is
> not as trivial as changing the quota.
>
> Quota was in the past and still is a very comfortable way to solve this.
>
> But what is the new recommended way for such a setting when the quota is
> going to be deprecated?
>
>
Thanks for the feedback. Helps us to prioritize. Will get back on this.

-Amar



> Kind regards
>
> Gudrun
> Am Donnerstag, den 19.07.2018, 12:26 +0530 schrieb Amar Tumballi:
> > Hi all,
> >
> > Over last 12 years of Gluster, we have developed many features, and
> continue to support most of it till now. But along the way, we have figured
> out
> > better methods of doing things. Also we are not actively maintaining
> some of these features.
> >
> > We are now thinking of cleaning up some of these ‘unsupported’ features,
> and mark them as ‘SunSet’ (i.e., would be totally taken out of codebase in
> > following releases) in next upcoming release, v5.0. The release notes
> will provide options for smoothly migrating to the supported configurations.
> >
> > If you are using any of these features, do let us know, so that we can
> help you with ‘migration’.. Also, we are happy to guide new developers to
> > work on those components which are not actively being maintained by
> current set of developers.
> >
> > List of features hitting sunset:
> >
> > ‘cluster/stripe’ translator:
> >
> > This translator was developed very early in the evolution of GlusterFS,
> and addressed one of the very common question of Distributed FS, which is
> > “What happens if one of my file is bigger than the available brick. Say,
> I have 2 TB hard drive, exported in glusterfs, my file is 3 TB”. While it
> > solved the purpose, it was very hard to handle failure scenarios, and
> give a real good experience to our users with this feature. Over the time,
> > Gluster solved the problem with it’s ‘Shard’ feature, which solves the
> problem in much better way, and provides much better solution with existing
> > well supported stack. Hence the proposal for Deprecation.
> >
> > If you are using this feature, then do write to us, as it needs a proper
> migration from existing volume to a new full supported volume type before
> > you upgrade.
> >
> > ‘storage/bd’ translator:
> >
> > This feature got into the code base 5 years back with this patch[1].
> Plan was to use a block device directly as a brick, which would help to
> handle
> > disk-image storage much easily in glusterfs.
> >
> > As the feature is not getting more contribution, and we are not seeing
> any user traction on this, would like to propose for Deprecation.
> >
> > If you are using the feature, plan to move to a supported gluster volume
> configuration, and have your setup ‘supported’ before upgrading to your new
> > gluster version.
> >
> > ‘RDMA’ transport support:
> >
> > Gluster started supporting RDMA while ib-verbs was still new, and very
> high-end infra around that time were using Infiniband. Engineers did work
> > with Mellanox, and got the technology into GlusterFS for better data
> migration, data copy. While current day kernels support very good speed with
> > IPoIB module itself, and there are no more bandwidth for experts in
> these area to maintain the feature, we recommend migrating over to TCP (IP
> > based) network for your volume.
> >
> > If you are successfully using RDMA transport, do get in touch with us to
> prioritize the migration plan for your volume. Plan is to work on this
> > after the release, so by version 6.0, we will have a cleaner transport
> code, which just needs to support one type.
> >
> > ‘Tiering’ feature
> >
> > Gluster’s tiering feature which was planned to be providing an option to
> keep your ‘hot’ data in different location than your cold data, so one can
> > get better performance. While we saw some users for the feature, it
> needs much more attention to be completely bug free. At the time, we are not
> > having any active maintainers for the feature, and hence suggesting to
> take it out of the ‘supported’ tag.
> >
> > If you are willing to take it up, and maintain it, do let us know, and
> we are happy to assist you.
> >
> > If you are already using tiering feature, before upgrading, make sure to
> do gluster volume tier detach all the bricks before upgrading to next
> > release. Also, we recommend you to use features like dmcache on your LVM
> setup to get best performance from bricks.
> >
> > ‘Quota’
> >
> > This is a call out for ‘Quota’ feature, 

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Gudrun Mareike Amedick]

Hi,

we're planning a dispersed volume with at least 50 project directories. Each of 
those has its own quota ranging between 0.1TB and 200TB. Comparing XFS
project quotas over several servers and bricks to make sure their total matches 
the desired value doesn't really sound practical. It would probably be
possible to create and maintain 50 volumes and more, but it doesn't seem to be 
a desirable solution. The quotas aren't fixed and resizing a volume is
not as trivial as changing the quota. 

Quota was in the past and still is a very comfortable way to solve this.

But what is the new recommended way for such a setting when the quota is going 
to be deprecated?

Kind regards

Gudrun
Am Donnerstag, den 19.07.2018, 12:26 +0530 schrieb Amar Tumballi:
> Hi all,
> 
> Over last 12 years of Gluster, we have developed many features, and continue 
> to support most of it till now. But along the way, we have figured out
> better methods of doing things. Also we are not actively maintaining some of 
> these features.
> 
> We are now thinking of cleaning up some of these ‘unsupported’ features, and 
> mark them as ‘SunSet’ (i.e., would be totally taken out of codebase in
> following releases) in next upcoming release, v5.0. The release notes will 
> provide options for smoothly migrating to the supported configurations.
> 
> If you are using any of these features, do let us know, so that we can help 
> you with ‘migration’.. Also, we are happy to guide new developers to
> work on those components which are not actively being maintained by current 
> set of developers.
> 
> List of features hitting sunset:
> 
> ‘cluster/stripe’ translator:
> 
> This translator was developed very early in the evolution of GlusterFS, and 
> addressed one of the very common question of Distributed FS, which is
> “What happens if one of my file is bigger than the available brick. Say, I 
> have 2 TB hard drive, exported in glusterfs, my file is 3 TB”. While it
> solved the purpose, it was very hard to handle failure scenarios, and give a 
> real good experience to our users with this feature. Over the time,
> Gluster solved the problem with it’s ‘Shard’ feature, which solves the 
> problem in much better way, and provides much better solution with existing
> well supported stack. Hence the proposal for Deprecation.
> 
> If you are using this feature, then do write to us, as it needs a proper 
> migration from existing volume to a new full supported volume type before
> you upgrade.
> 
> ‘storage/bd’ translator:
> 
> This feature got into the code base 5 years back with this patch[1]. Plan was 
> to use a block device directly as a brick, which would help to handle
> disk-image storage much easily in glusterfs.
> 
> As the feature is not getting more contribution, and we are not seeing any 
> user traction on this, would like to propose for Deprecation.
> 
> If you are using the feature, plan to move to a supported gluster volume 
> configuration, and have your setup ‘supported’ before upgrading to your new
> gluster version.
> 
> ‘RDMA’ transport support:
> 
> Gluster started supporting RDMA while ib-verbs was still new, and very 
> high-end infra around that time were using Infiniband. Engineers did work
> with Mellanox, and got the technology into GlusterFS for better data 
> migration, data copy. While current day kernels support very good speed with
> IPoIB module itself, and there are no more bandwidth for experts in these 
> area to maintain the feature, we recommend migrating over to TCP (IP
> based) network for your volume.
> 
> If you are successfully using RDMA transport, do get in touch with us to 
> prioritize the migration plan for your volume. Plan is to work on this
> after the release, so by version 6.0, we will have a cleaner transport code, 
> which just needs to support one type.
> 
> ‘Tiering’ feature
> 
> Gluster’s tiering feature which was planned to be providing an option to keep 
> your ‘hot’ data in different location than your cold data, so one can
> get better performance. While we saw some users for the feature, it needs 
> much more attention to be completely bug free. At the time, we are not
> having any active maintainers for the feature, and hence suggesting to take 
> it out of the ‘supported’ tag.
> 
> If you are willing to take it up, and maintain it, do let us know, and we are 
> happy to assist you.
> 
> If you are already using tiering feature, before upgrading, make sure to do 
> gluster volume tier detach all the bricks before upgrading to next
> release. Also, we recommend you to use features like dmcache on your LVM 
> setup to get best performance from bricks.
> 
> ‘Quota’
> 
> This is a call out for ‘Quota’ feature, to let you all know that it will be 
> ‘no new development’ state. While this feature is ‘actively’ in use by
> many people, the challenges we have in accounting mechanisms involved, has 
> made it hard to achieve good performance with the feature. Also, the
> amount of extended att

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Amar Tumballi]

On Thu, Jul 19, 2018 at 6:46 PM, mabi  wrote:

> Hi Amar,
>
> Just wanted to say that I think the quota feature in GlusterFS is really
> useful. In my case I use it on one volume where I have many cloud
> installations (mostly files) for different people and all these need to
> have a different quota set on a specific directory. The GlusterFS quota
> allows me nicely to manage that which would not be possible in the
> application directly. It would really be an overhead for me to for example
> to have one volume per installation just because of setting the max size
> like that.
>
> I hope that this feature can continue to exist.
>
>
Thanks for the feedback. We will consider this use-case.


> Best regards,
> M.
>
>
>
> ‐‐‐ Original Message ‐‐‐
> On July 19, 2018 8:56 AM, Amar Tumballi  wrote:
>
> Hi all,
>
> Over last 12 years of Gluster, we have developed many features, and
> continue to support most of it till now. But along the way, we have figured
> out better methods of doing things. Also we are not actively maintaining
> some of these features.
>
> We are now thinking of cleaning up some of these ‘unsupported’ features,
> and mark them as ‘SunSet’ (i.e., would be totally taken out of codebase in
> following releases) in next upcoming release, v5.0. The release notes
> will provide options for smoothly migrating to the supported configurations.
>
> If you are using any of these features, do let us know, so that we can
> help you with ‘migration’.. Also, we are happy to guide new developers to
> work on those components which are not actively being maintained by current
> set of developers.
> *List of features hitting sunset:*
> *‘cluster/stripe’ translator:*
>
> This translator was developed very early in the evolution of GlusterFS,
> and addressed one of the very common question of Distributed FS, which is
> “What happens if one of my file is bigger than the available brick. Say, I
> have 2 TB hard drive, exported in glusterfs, my file is 3 TB”. While it
> solved the purpose, it was very hard to handle failure scenarios, and give
> a real good experience to our users with this feature. Over the time,
> Gluster solved the problem with it’s ‘Shard’ feature, which solves the
> problem in much better way, and provides much better solution with existing
> well supported stack. Hence the proposal for Deprecation.
>
> If you are using this feature, then do write to us, as it needs a proper
> migration from existing volume to a new full supported volume type before
> you upgrade.
> *‘storage/bd’ translator:*
>
> This feature got into the code base 5 years back with this *patch*
> [1]. Plan was to use a block device
> directly as a brick, which would help to handle disk-image storage much
> easily in glusterfs.
>
> As the feature is not getting more contribution, and we are not seeing any
> user traction on this, would like to propose for Deprecation.
>
> If you are using the feature, plan to move to a supported gluster volume
> configuration, and have your setup ‘supported’ before upgrading to your new
> gluster version.
> *‘RDMA’ transport support:*
>
> Gluster started supporting RDMA while ib-verbs was still new, and very
> high-end infra around that time were using Infiniband. Engineers did work
> with Mellanox, and got the technology into GlusterFS for better data
> migration, data copy. While current day kernels support very good speed
> with IPoIB module itself, and there are no more bandwidth for experts in
> these area to maintain the feature, we recommend migrating over to TCP (IP
> based) network for your volume.
>
> If you are successfully using RDMA transport, do get in touch with us to
> prioritize the migration plan for your volume. Plan is to work on this
> after the release, so by version 6.0, we will have a cleaner transport
> code, which just needs to support one type.
> *‘Tiering’ feature*
>
> Gluster’s tiering feature which was planned to be providing an option to
> keep your ‘hot’ data in different location than your cold data, so one can
> get better performance. While we saw some users for the feature, it needs
> much more attention to be completely bug free. At the time, we are not
> having any active maintainers for the feature, and hence suggesting to take
> it out of the ‘supported’ tag.
>
> If you are willing to take it up, and maintain it, do let us know, and we
> are happy to assist you.
>
> If you are already using tiering feature, before upgrading, make sure to
> do gluster volume tier detach all the bricks before upgrading to next
> release. Also, we recommend you to use features like dmcache on your LVM
> setup to get best performance from bricks.
> *‘Quota’*
>
> This is a call out for ‘Quota’ feature, to let you all know that it will
> be ‘no new development’ state. While this feature is ‘actively’ in use by
> many people, the challenges we have in accounting mechanisms involved, has
> made it hard to achieve good performance with the

Re: [Gluster-devel] [Gluster-users] Proposal to mark few features as Deprecated / SunSet from Version 5.0

[Amar Tumballi]

On Thu, Jul 19, 2018 at 6:06 PM, Jim Kinney  wrote:

> Too bad the RDMA will be abandoned. It's the perfect transport for
> intranode processing and data sync.
>
>


> I currently use RDMA on a computational cluster between nodes and gluster
> storage. The older IB cards will support 10G IP and 40G IB. I've had some
> success with connectivity but am still faltering with fuse performance. As
> soon as some retired gear is reconnected I'll have a test bed for HA NFS
> over RDMA to computational cluster and 10G IP to non-cluster systems.
>
> But it looks like Gluster 6 is a ways away so maybe I'll get more hardware
> or time to pitch in some code after groking enough IB.
>
>
We are happy to continue to make releases with RDMA for some more time if
there are users. The "proposal" is to make sure we give enough heads up
about the experts in that area not having cycles to make any more
enhancements to the feature.



> Thanks for the heads up and all the work to date.
>

Glad to hear back from you! Makes us realize there are things which we
haven't touched in some time, but people using them.

Thanks,
Amar


>
> On July 19, 2018 2:56:35 AM EDT, Amar Tumballi 
> wrote:
>>
>>
>> *Hi all,Over last 12 years of Gluster, we have developed many features,
>> and continue to support most of it till now. But along the way, we have
>> figured out better methods of doing things. Also we are not actively
>> maintaining some of these features.We are now thinking of cleaning up some
>> of these ‘unsupported’ features, and mark them as ‘SunSet’ (i.e., would be
>> totally taken out of codebase in following releases) in next upcoming
>> release, v5.0. The release notes will provide options for smoothly
>> migrating to the supported configurations.If you are using any of these
>> features, do let us know, so that we can help you with ‘migration’.. Also,
>> we are happy to guide new developers to work on those components which are
>> not actively being maintained by current set of developers.List of features
>> hitting sunset:‘cluster/stripe’ translator:This translator was developed
>> very early in the evolution of GlusterFS, and addressed one of the very
>> common question of Distributed FS, which is “What happens if one of my file
>> is bigger than the available brick. Say, I have 2 TB hard drive, exported
>> in glusterfs, my file is 3 TB”. While it solved the purpose, it was very
>> hard to handle failure scenarios, and give a real good experience to our
>> users with this feature. Over the time, Gluster solved the problem with
>> it’s ‘Shard’ feature, which solves the problem in much better way, and
>> provides much better solution with existing well supported stack. Hence the
>> proposal for Deprecation.If you are using this feature, then do write to
>> us, as it needs a proper migration from existing volume to a new full
>> supported volume type before you upgrade.‘storage/bd’ translator:This
>> feature got into the code base 5 years back with this patch
>> [1]. Plan was to use a block device
>> directly as a brick, which would help to handle disk-image storage much
>> easily in glusterfs.As the feature is not getting more contribution, and we
>> are not seeing any user traction on this, would like to propose for
>> Deprecation.If you are using the feature, plan to move to a supported
>> gluster volume configuration, and have your setup ‘supported’ before
>> upgrading to your new gluster version.‘RDMA’ transport support:Gluster
>> started supporting RDMA while ib-verbs was still new, and very high-end
>> infra around that time were using Infiniband. Engineers did work with
>> Mellanox, and got the technology into GlusterFS for better data migration,
>> data copy. While current day kernels support very good speed with IPoIB
>> module itself, and there are no more bandwidth for experts in these area to
>> maintain the feature, we recommend migrating over to TCP (IP based) network
>> for your volume.If you are successfully using RDMA transport, do get in
>> touch with us to prioritize the migration plan for your volume. Plan is to
>> work on this after the release, so by version 6.0, we will have a cleaner
>> transport code, which just needs to support one type.‘Tiering’
>> featureGluster’s tiering feature which was planned to be providing an
>> option to keep your ‘hot’ data in different location than your cold data,
>> so one can get better performance. While we saw some users for the feature,
>> it needs much more attention to be completely bug free. At the time, we are
>> not having any active maintainers for the feature, and hence suggesting to
>> take it out of the ‘supported’ tag.If you are willing to take it up, and
>> maintain it, do let us know, and we are happy to assist you.If you are
>> already using tiering feature, before upgrading, make sure to do gluster
>> volume tier detach all the bricks before upgrading to next release. Also,
>> we recommend you to use features like dmcache