Re: [Gluster-devel] [Gluster-users] Rebalance improvement.

On Mon, Aug 3, 2020 at 2:53 PM sankarshan wrote: > On Mon, 3 Aug 2020 at 12:47, Susant Palai wrote: > > > > Centos Users can add the following repo and install the build from the > master branch to try out the feature. [Testing purpose only, not ready for > consumpt

Re: [Gluster-devel] [Gluster-users] Rebalance improvement.

> On 03-Aug-2020, at 13:58, Aravinda VK wrote: > > Interesting numbers. Thanks for the effort. > > What is the unit of old/new numbers? seconds? Minutes. > >> On 03-Aug-2020, at 12:47 PM, Susant Palai > <mailto:spa...@redhat.com>> wrote: >>

Re: [Gluster-devel] Rebalance improvement.

at 11:16 AM Susant Palai wrote: > Hi, > Recently, we have pushed some performance improvements for Rebalance > Crawl which used to consume a significant amount of time, out of the entire > rebalance process. > > > The patch [1] is recently merged in upstream and may land

[Gluster-devel] Rebalance improvement.

. Would request our community to try out the feature and give us feedback. More information regarding the same will follow. Thanks & Regards, Susant Palai [1] https://review.gluster.org/#/c/glusterfs/+/24443/ <https://review.gluster.org/#/c/glusterfs/

Re: [Gluster-devel] Detect is quota enabled or disabled - in DHT code?

On Wed, Jan 8, 2020 at 4:29 PM Yaniv Kaul wrote: > I'd like to add to the DHT conf something like conf->quota_enabled, so if > it's not, I can skip quite a bit of work done today in DHT. I'm just unsure > where, in the init and reconfigure of DHT, I can detect and introduce this. > In dht_init

Re: [Gluster-devel] Potential impact of Cloudsync on posix performance

On Tue, Dec 17, 2019 at 7:00 PM Yaniv Kaul wrote: > I'm looking at the code, and I'm seeing calls everywhere to > posix_cs_maintenance(). > perhaps we should add to the volume configuration some boolean if > cloudsync feature is even enabled for that volume? >

Re: [Gluster-devel] Adding ALUA support for Gluster-Block

On Mon, Oct 29, 2018 at 2:49 PM Niels de Vos wrote: > On Mon, Oct 29, 2018 at 12:06:53PM +0530, Susant Palai wrote: > > On Fri, Oct 26, 2018 at 6:22 PM Niels de Vos wrote: > > > > > On Fri, Oct 26, 2018 at 05:54:28PM +0530, Susant Palai wrote: > > > > Hi,

Re: [Gluster-devel] Adding ALUA support for Gluster-Block

On Fri, Oct 26, 2018 at 6:22 PM Niels de Vos wrote: > On Fri, Oct 26, 2018 at 05:54:28PM +0530, Susant Palai wrote: > > Hi, > >For ALUA in Gluster-Block, we need fencing support from GlusterFS. > This > > is targeted mainly to avoid corruption issues during fail

[Gluster-devel] Adding ALUA support for Gluster-Block

Hi, For ALUA in Gluster-Block, we need fencing support from GlusterFS. This is targeted mainly to avoid corruption issues during fail-over from INITIATOR. You can find the problem statement, design document at [1] and the GitHub discussions at [2]. Requesting your feedback on the same.

Re: [Gluster-devel] Release 5: Release calendar and status updates

Comments inline On Wed, Aug 22, 2018 at 11:34 PM Shyam Ranganathan wrote: > On 08/14/2018 02:28 PM, Shyam Ranganathan wrote: > > 2) Branching date: (Monday) Aug-20-2018 (~40 days before GA tagging) > > We are postponing branching to 2nd week of September (10th), as the > entire effort in this

Re: [Gluster-devel] tests/bugs/distribute/bug-1122443.t - spurious failure

Will have a look at it and update. Susant On Wed, 1 Aug 2018, 18:58 Krutika Dhananjay, wrote: > Same here - https://build.gluster.org/job/centos7-regression/2024/console > > -Krutika > > On Sun, Jul 29, 2018 at 1:53 PM, Atin Mukherjee > wrote: > >> tests/bugs/distribute/bug-1122443.t fails my

Re: [Gluster-devel] ./tests/basic/md-cache/bug-1418249.t failing

Sent a patch here - https://review.gluster.org/#/c/19768/ . On Mon, Mar 26, 2018 at 7:50 AM, Susant Palai <spa...@redhat.com> wrote: > Hi Poornima, > As https://review.gluster.org/#/c/19744/ got merged, the $subject > test case is failing on master. > The "

[Gluster-devel] ./tests/basic/md-cache/bug-1418249.t failing

Hi Poornima, As https://review.gluster.org/#/c/19744/ got merged, the $subject test case is failing on master. The "network.inode-lru-limit" is expecting the old "5" vs the current "20". Requesting to fix it. Susant ___ Gluster-devel

[Gluster-devel] Cloudsync Xlator for Archival Use case

Hi, We are proposing cloudsync xlator for the archival use case for 4.1. For more details refer following documents. - Github-issue: https://github.com/gluster/glusterfs/issues/387 - Spec-file : https://review.gluster.org/#/c/18854/ - More design details : [ 1] Please

Re: [Gluster-devel] Release 4.1: LTM release targeted for end of May

Hi, Would like to propose Cloudsync Xlator(for Archival use-case) for 4.1. (github issue-id #387). Initial patch (under review) is posted here: https://review.gluster.org/#/c/18532/. Spec file: https://review.gluster.org/#/c/18854/ Thanks, Susant On Thu, Mar 15, 2018 at 4:05 PM,

[Gluster-devel] core in regression run

Hi, There is a core for test case: ./tests/bugs/rpc/bug-847624.t. *link*: https://build.gluster.org/job/centos7-regression/232/console Requesting concerned team to look into this. Susant ___ Gluster-devel mailing list Gluster-devel@gluster.org

Re: [Gluster-devel] [Gluster-users] cluster/dht: restrict migration of opened files

This does not restrict tiered migrations. Susant On 18 Jan 2018 8:18 pm, "Milind Changire" wrote: On Tue, Jan 16, 2018 at 2:52 PM, Raghavendra Gowdappa wrote: > All, > > Patch [1] prevents migration of opened files during rebalance operation. > If

Re: [Gluster-devel] Release 4.0: Making it happen!

Hi, I would request some extension. Targetting for the 27th weekend. Thanks, Susant On Tue, Jan 16, 2018 at 8:57 PM, Shyam Ranganathan wrote: > On 01/10/2018 01:14 PM, Shyam Ranganathan wrote: > > Hi, > > > > 4.0 branching date is slated on the 16th of Jan 2018 and

Re: [Gluster-devel] Release 3.11: Pending features and reviews (2 days to branching)

Hi Shyam, Here is the patch list for 3.11 from my side. 1- https://review.gluster.org/#/c/16427/ 2- https://review.gluster.org/#/c/16980/ Thanks, Susant - Original Message - > From: "Shyam" <srang...@redhat.com> > To: "Susant Palai" <spa.

Re: [Gluster-devel] Release 3.11: Pending features and reviews (2 days to branching)

- Original Message - > From: "Shyam" > To: "Gluster Devel" > Cc: "Kaushal Madappa" > Sent: Wednesday, 26 April, 2017 5:11:29 AM > Subject: [Gluster-devel] Release 3.11: Pending features and reviews (2 days > to

[Gluster-devel] ./tests/bitrot/bug-1373520.t failure on master

Hi, test case: ./tests/bitrot/bug-1373520.t is seen to be failing on different regression runs on master. Requesting to look in to it. Few instances: https://build.gluster.org/job/netbsd7-regression/3118/consoleFull https://build.gluster.org/job/centos6-regression/3451/

[Gluster-devel] Feature: Rebalance completion time estimation

Hello All, We have been receiving many requests from users to give a "Rebalance completion time estimation". This email is to gather ideas and feedback from the community for the same. We have one proposal, but nothing is concrete. Please feel free to give your input for this problem. A

Re: [Gluster-devel] Review request for lock migration patches

+Poornima, Talur - Original Message - > From: "Pranith Kumar Karampuri" <pkara...@redhat.com> > To: "Susant Palai" <spa...@redhat.com> > Cc: "Raghavendra Gowdappa" <rgowd...@redhat.com>, "gluster-devel" > <gl

Re: [Gluster-devel] Review request for lock migration patches

Hi, It would be nice to get the patches in 3.9. The reviews are pending for a long time. Requesting reviews. Thanks, Susant - Original Message - > From: "Susant Palai" <spa...@redhat.com> > To: "Raghavendra Gowdappa" <rgowd...@redhat.com>

Re: [Gluster-devel] Review request for lock migration patches

Gentle reminder for reviews. Thanks, Susant - Original Message - > From: "Susant Palai" <spa...@redhat.com> > To: "Raghavendra Gowdappa" <rgowd...@redhat.com>, "Pranith Kumar Karampuri" > <pkara...@redhat.com> > Cc: "glus

Re: [Gluster-devel] spurious failures for ./tests/basic/afr/root-squash-self-heal.t

ps://build.gluster.org/job/netbsd7-regression/358/consoleFull Thanks, Susant - Original Message - > From: "Susant Palai" <spa...@redhat.com> > To: "gluster-devel" <gluster-devel@gluster.org> > Sent: Thursday, 1 September, 2016 12:13:01 PM > Subj

[Gluster-devel] spurious failures for ./tests/basic/afr/root-squash-self-heal.t

Hi, $subject is failing spuriously for one of my patch. One of the test case is: EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 0 ___ Gluster-devel mailing list Gluster-devel@gluster.org

[Gluster-devel] Review request for lock migration patches

Hi, There are few patches targeted for lock migration. Requesting for review. 1. http://review.gluster.org/#/c/13901/ 2. http://review.gluster.org/#/c/14286/ 3. http://review.gluster.org/#/c/14492/ 4. http://review.gluster.org/#/c/15076/ Thanks, Susant~

Re: [Gluster-devel] [Gluster-users] CFP for Gluster Developer Summit

to data inconsistency in the files owing to successful writes by more than one client on a file incorrectly. In this talk, I will present the design of lock migration, its status and how this solves the problem of data inconsistency. Thanks, Susant Palai

[Gluster-devel] Requesting review for patch: http://review.gluster.org/#/c/13901/

Hi, Patch in $subject is needed for lock(post lock migration), lease to work. Requesting your reviews asap so that this can be targeted for 3.8.1. Thanks, Susant~ ___ Gluster-devel mailing list Gluster-devel@gluster.org

[Gluster-devel] review request

Hi, Requesting reviews for http://review.gluster.org/#/c/14251 and http://review.gluster.org/#/c/14252. Thanks, Susant~ ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel

[Gluster-devel] ./tests/basic/tier/new-tier-cmds.t failing on master branch

Hi, ./tests/basic/tier/new-tier-cmds.t failed on https://build.gluster.org/job/rackspace-regression-2GB-triggered/20191/console. I ran it on master branch on my local setup and it fails continuously. volume detach-tier commit: failed: Detach is in progress. Please retry after completion

[Gluster-devel] netbsd smoke failure

Hi All, On many of my patches the following error is seen from netbsd smoke test. Triggered by Gerrit: http://review.gluster.org/13993 Building remotely on netbsd0.cloud.gluster.org (netbsd_build) in workspace /home/jenkins/root/workspace/netbsd6-smoke > git rev-parse --is-inside-work-tree #

[Gluster-devel] Requesting lock-migration reviews

Hi All, Following patches need reviews for lock-migration feature. They are targeted for 3.8. Requesting for reviews. 1- http://review.gluster.org/#/c/13970/ 2- http://review.gluster.org/#/c/13993/ 3- http://review.gluster.org/#/c/13994/ 4- http://review.gluster.org/#/c/13995/ 5-

Re: [Gluster-devel] Posix lock migration design

- From: "Susant Palai" <spa...@redhat.com> To: "Gluster Devel" <gluster-devel@gluster.org> Sent: Thursday, 10 March, 2016 12:30:15 PM Subject: Re: [Gluster-devel] Posix lock migration design Forgot to detail about the problems/race. Details inline! - Origin

Re: [Gluster-devel] Posix lock migration design

Forgot to detail about the problems/race. Details inline! - Original Message - > From: "Susant Palai" <spa...@redhat.com> > To: "Gluster Devel" <gluster-devel@gluster.org> > Sent: Thursday, 10 March, 2016 11:35:53 AM > Subject: Re: [Gluster-de

Re: [Gluster-devel] ./tests/bugs/fuse/bug-924726.t failing regression

/tests/bugs/fuse/bug-924726.t failing consistently. here are the links: https://build.gluster.org/job/rackspace-regression-2GB-triggered/16405/consoleFull https://build.gluster.org/job/rackspace-regression-2GB-triggered/16423/consoleFull Regards, Susant - Original Message - From: "Dan

[Gluster-devel] spurious failure on ./tests/bugs/replicate/bug-1221481-allow-fops-on-dir-split-brain.t

Hi, ./tests/bugs/replicate/bug-1221481-allow-fops-on-dir-split-brain.t has failed twice on patch: http://review.gluster.org/#/c/12235/ Requesting AFT team to look into it. links to failures: https://build.gluster.org/job/rackspace-regression-2GB-triggered/14597/consoleFull

Re: [Gluster-devel] 3.7.5 release

Would like to get in http://review.gluster.org/#/c/12235/. Once merged in master will backport to 3.7.5. Susant - Original Message - From: "Pranith Kumar Karampuri" To: "Gluster Devel" Sent: Thursday, 1 October, 2015 9:22:15 AM Subject:

Re: [Gluster-devel] 3.7.5 release

yes spurious failure. The test case has nothing to do with rebalance. - Original Message - From: "Raghavendra Gowdappa" <rgowd...@redhat.com> To: "Susant Palai" <spa...@redhat.com> Cc: "Pranith Kumar Karampuri" <pkara...@redhat.com>, &

[Gluster-devel] tier.t failing consistently

Hi, Can some body take a look into to ./tests/basic/tier/tier.t ? Here are the links: https://build.gluster.org/job/rackspace-netbsd7-regression-triggered/10217/consoleFull https://build.gluster.org/job/rackspace-netbsd7-regression-triggered/10207/consoleFull

Re: [Gluster-devel] Lock migration as a part of rebalance

- Original Message - From: "Raghavendra G" To: "Shyam" Cc: "Gluster Devel" Sent: Thursday, 2 July, 2015 10:21:38 AM Subject: Re: [Gluster-devel] Lock migration as a part of rebalance One solution I

Re: [Gluster-devel] [Gluster-users] cluster.min-free-disk is not working in distributed disperse volume

Mohamed, Will investigate in to weighted rebalance behavior. Susant - Original Message - From: Mohamed Pakkeer mdfakk...@gmail.com To: Susant Palai spa...@redhat.com Cc: Mathieu Chateau mathieu.chat...@lotp.fr, gluster-users gluster-us...@gluster.org, Gluster Devel gluster-devel

[Gluster-devel] Netbsd failures on ./tests/basic/afr/arbiter-statfs.t

Ravi, The test case ./tests/basic/afr/arbiter-statfs.t failing frequently on netbsd machine. Requesting to take a look. Thanks, Susant ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel

Re: [Gluster-devel] Netbsd failures on ./tests/basic/afr/arbiter-statfs.t

Cool. Need to rebase then. - Original Message - From: Atin Mukherjee amukh...@redhat.com To: Susant Palai spa...@redhat.com, Ravishankar N ravishan...@redhat.com Cc: Gluster Devel gluster-devel@gluster.org Sent: Monday, 24 August, 2015 4:33:26 PM Subject: Re: [Gluster-devel] Netbsd

Re: [Gluster-devel] Netbsd failures on ./tests/basic/afr/arbiter-statfs.t

links: https://build.gluster.org/job/rackspace-netbsd7-regression-triggered/9627/consoleFull https://build.gluster.org/job/rackspace-netbsd7-regression-triggered/9628/consoleFull - Original Message - From: Susant Palai spa...@redhat.com To: Ravishankar N ravishan...@redhat.com Cc

Re: [Gluster-devel] [Gluster-users] cluster.min-free-disk is not working in distributed disperse volume

Hi, Cluster.min-free-disk controls new file creation on the bricks. If you happen to write to the existing files on the brick and that is leading to brick getting full, then most probably you should run a rebalance. Regards, Susant - Original Message - From: Mathieu Chateau

Re: [Gluster-devel] Skipped files during rebalance

pid. The state dump should give some hint about the high mem-usage. Thanks, Susant - Original Message - From: Susant Palai spa...@redhat.com To: Christophe TREFOIS christophe.tref...@uni.lu Cc: Gluster Devel gluster-devel@gluster.org Sent: Friday, 21 August, 2015 3:52:07 PM Subject: Re

Re: [Gluster-devel] Skipped files during rebalance

Thanks Christophe for the details. Will get back to you with the analysis. Regards, Susant - Original Message - From: Christophe TREFOIS christophe.tref...@uni.lu To: Susant Palai spa...@redhat.com Cc: Raghavendra Gowdappa rgowd...@redhat.com, Nithya Balachandran nbala...@redhat.com

[Gluster-devel] Netbsd build failure

Hi, I tried running netbsd regression twice on a patch. And twice it failed at the same point. Here is the error: snip Build GlusterFS *** + '/opt/qa/build.sh' File /usr/pkg/lib/python2.7/site.py, line 601 [2015-08-19 05:45:06.N]:++

Re: [Gluster-devel] Netbsd build failure

https://build.gluster.org/job/rackspace-netbsd7-regression-triggered/9480/console - Original Message - From: Susant Palai spa...@redhat.com To: Emmanuel Dreyfus m...@netbsd.org Sent: Thursday, 20 August, 2015 2:14:11 PM Subject: Re: Netbsd build failure And there is a new failure

Re: [Gluster-devel] Skipped files during rebalance

Comments inline. - Original Message - From: Christophe TREFOIS christophe.tref...@uni.lu To: Susant Palai spa...@redhat.com Cc: Raghavendra Gowdappa rgowd...@redhat.com, Nithya Balachandran nbala...@redhat.com, Shyamsundar Ranganathan srang...@redhat.com, Mohammed Rafi K C rkavu

Re: [Gluster-devel] Skipped files during rebalance

Hi Christophe, Forgot to ask you to post the rebalance and glusterd logs. Regards, Susant - Original Message - From: Susant Palai spa...@redhat.com To: Christophe TREFOIS christophe.tref...@uni.lu Cc: Gluster Devel gluster-devel@gluster.org Sent: Wednesday, August 19, 2015 11

Re: [Gluster-devel] Skipped files during rebalance

rebalance or even post rebalance? 4. Gluster version Will ask for more information in case needed. Regards, Susant - Original Message - From: Christophe TREFOIS christophe.tref...@uni.lu To: Raghavendra Gowdappa rgowd...@redhat.com, Nithya Balachandran nbala...@redhat.com, Susant

[Gluster-devel] testcase ./tests/geo-rep/georep-basic-dr-rsync.t failure

Hi, ./tests/geo-rep/georep-basic-dr-rsync.t fails in regression machine as well as in my local machine also. Requesting geo-rep team to look in to it. link: https://build.gluster.org/job/rackspace-netbsd7-regression-triggered/9158/consoleFull Regards, Susant

Re: [Gluster-devel] Iusses with Random read/write

++CCing gluster-devel to have more eye on this problem. Susant - Original Message - From: Subrata Ghosh subrata.gh...@ericsson.com To: Susant Palai spa...@redhat.com (spa...@redhat.com) spa...@redhat.com, Vijay Bellur vbel...@redhat.com (vbel...@redhat.com) vbel...@redhat.com Cc

Re: [Gluster-devel] [FAILED] regression tests: tests/bugs/distribute/bug-1066798.t

Comments inline. - Original Message - From: Niels de Vos nde...@redhat.com To: gluster-devel@gluster.org Cc: spa...@redhat.com, aseng...@redhat.com Sent: Tuesday, 21 July, 2015 2:13:37 PM Subject: Re: [Gluster-devel] [FAILED] regression tests: tests/bugs/distribute/bug-1066798.t

Re: [Gluster-devel] Regression Failure: ./tests/basic/quota.t

Comments inline. - Original Message - From: Sachin Pandit span...@redhat.com To: Kotresh Hiremath Ravishankar khire...@redhat.com Cc: Gluster Devel gluster-devel@gluster.org Sent: Thursday, July 2, 2015 12:21:44 PM Subject: Re: [Gluster-devel] Regression Failure:

Re: [Gluster-devel] Three Issues Confused me recently

Comment inline. - Original Message - From: christ1...@sina.com To: gluster-devel gluster-devel@gluster.org Sent: Thursday, 25 June, 2015 7:56:45 PM Subject: [Gluster-devel] Three Issues Confused me recently Hi, everyone! Nowadays, t here are three issues confusing me

Re: [Gluster-devel] Regarding the issues gluster DHT and Layouts of bricks

Commets inline. - Original Message - From: Subrata Ghosh subrata.gh...@ericsson.com To: gluster-devel@gluster.org, gluster-us...@gluster.org Cc: Nobin Mathew nobin.mat...@ericsson.com, Susant Palai spa...@redhat.com, Vijay Bellur vbel...@redhat.com Sent: Thursday, 21 May, 2015 4:26

Re: [Gluster-devel] gluster crashes in dht_getxattr_cbk() due to null pointer dereference.

Fixed a similar crash in dht_getxattr_cbk here: http://review.gluster.org/#/c/10467/ Susant - Original Message - From: Paul Guo bigpaul...@foxmail.com To: gluster-devel@gluster.org Sent: Friday, 8 May, 2015 3:25:01 PM Subject: [Gluster-devel] gluster crashes in dht_getxattr_cbk() due to

Re: [Gluster-devel] Rebalance improvement design

Comments inline - Original Message - From: Benjamin Turner bennytu...@gmail.com To: Susant Palai spa...@redhat.com Cc: Vijay Bellur vbel...@redhat.com, Gluster Devel gluster-devel@gluster.org Sent: Monday, May 4, 2015 8:58:13 PM Subject: Re: [Gluster-devel] Rebalance improvement

Re: [Gluster-devel] Rebalance improvement design

Hi Ben I checked out the glusterfs process attaching gdb and I could not find the newer code. Can you confirm whether you took the new patch ? patch i: http://review.gluster.org/#/c/9657/ Thanks, Susant - Original Message - From: Susant Palai spa...@redhat.com To: Benjamin Turner

Re: [Gluster-devel] Rebalance improvement design

Turner bennytu...@gmail.com To: Nithya Balachandran nbala...@redhat.com Cc: Susant Palai spa...@redhat.com, Gluster Devel gluster-devel@gluster.org Sent: Wednesday, April 29, 2015 2:13:05 AM Subject: Re: [Gluster-devel] Rebalance improvement design I am not seeing the performance you were

Re: [Gluster-devel] Gerrit review UI documentation

Thanks Ravi. Very helpful. - Original Message - From: Ravishankar N ravishan...@redhat.com To: Gluster Devel gluster-devel@gluster.org Sent: Friday, April 24, 2015 2:00:52 PM Subject: [Gluster-devel] Gerrit review UI documentation Thought this might be helpful if you want to

Re: [Gluster-devel] Core by test case : georep-tarssh-hybrid.t

Appended comments inline. - Original Message - From: Susant Palai spa...@redhat.com To: Kotresh Hiremath Ravishankar khire...@redhat.com Cc: gluster-devel@gluster.org Sent: Friday, April 24, 2015 7:17:33 PM Subject: Re: [Gluster-devel] Core by test case : georep-tarssh-hybrid.t Hi

Re: [Gluster-devel] Regression: Spurious Failures

Aware of uss.t spurious failures. - Original Message - From: Kotresh Hiremath Ravishankar khire...@redhat.com To: Gluster Devel gluster-devel@gluster.org Sent: Thursday, 23 April, 2015 2:26:50 PM Subject: [Gluster-devel] Regression: Spurious Failures Hi all, I am seeing the following

Re: [Gluster-devel] Rebalance improvement design

To: Vijay Bellur vbel...@redhat.com Cc: Susant Palai spa...@redhat.com, Gluster Devel gluster-devel@gluster.org Sent: Thursday, 9 April, 2015 2:10:30 AM Subject: Re: [Gluster-devel] Rebalance improvement design I have some rebalance perf regression stuff I have been working on, is there an RPM

[Gluster-devel] Rebalance improvement design

Hi, Posted patch for rebalance improvement here: http://review.gluster.org/#/c/9657/ . You can find the feature page here: http://www.gluster.org/community/documentation/index.php/Features/improve_rebalance_performance The current patch address two part of the design proposed. 1. Rebalance