Re: [Gluster-devel] Caching support in glusterfs
On Tue, Nov 24, 2015 at 10:35:20AM -0500, Jeff Darcy wrote: > > > > On November 24, 2015 at 6:47:59 AM, Avik Sil (avik@hgst.com) wrote: > > While searching for caching support in glusterfs I stumbled upon this > > link: > > http://www.gluster.org/community/documentation/index.php/Features/caching > > > > But I didn't get much info from it. What is plan ahead? > > There is some ongoing work on creating and improving the support > necessary to support caching/delegations in Ganesha (NFS) and Samba > (SMB). Perhaps members of those teams could elaborate. Unfortunately, > there’s no current work on using those same features to create a > generalized caching layer within “core” (native protocol) GlusterFS > itself. While there’s broad agreement that it would be useful, such an > effort requires someone to lead/drive it and nobody has stepped up to do > so. Both the Linux NFS client (nfs kernel module) and the Linux SMB client (cifs kernel module) support client-side read-caching through FS-Cache. To use this, you basically do the following: # yum install cachefilesd # systemctl enable cachefilesd # systemctl start cachefilesd # mount -t nfs -o fsc storage.example.com:/volume /mnt The above is from memory, and may not be completely correct. You can find more details here: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/filesystems/caching/fscache.txt http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/filesystems/caching/cachefiles.txt There was a start to add support for FS-Cache to the FUSE kernel module, but progress on that has stalled for a while. Assistance with that is welcome, and I can find the work-in-progress patches if someone is interested in helping out. HTH, Niels signature.asc Description: PGP signature ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel
Re: [Gluster-devel] Caching support in glusterfs
On 11/26/2015 03:35 PM, Avik Sil wrote: On Tuesday 24 November 2015 09:58 PM, Vijay Bellur wrote: - Original Message - From: "Avik Sil" To: gluster-devel@gluster.org Sent: Tuesday, November 24, 2015 6:47:44 AM Subject: [Gluster-devel] Caching support in glusterfs While searching for caching support in glusterfs I stumbled upon this link: http://www.gluster.org/community/documentation/index.php/Features/caching But I didn't get much info from it. What is plan ahead? What aspects of caching support would you be interested in? We'll be interested in client-side caching support. As Jeff mentioned, can you please elaborate more on supporting caching in Ganesha and Samba? As you may be aware of latest versions of NFS/SMB protocol have added the support for Delegation/Leases which shall guarantee certain semantics to their clients with respect to file sharing. Protocol clients thus are guaranteed cache consistency and can do aggressive data caching. There is on-going effort to support such Leases on Gluster. Apart from that, NFS-Ganesha server currently does attribute caching of the files and directories being accessed. I am not sure if there is any caching being done by SMB server. Request others to comment. Thanks, Soumya Regards, Avik HGST E-mail Confidentiality Notice & Disclaimer: This e-mail and any files transmitted with it may contain confidential or legally privileged information of HGST and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited. If you have received this e-mail in error, please notify the sender immediately and delete the e-mail in its entirety from your system. ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel
Re: [Gluster-devel] Caching support in glusterfs
On Tuesday 24 November 2015 09:58 PM, Vijay Bellur wrote: - Original Message - From: "Avik Sil" To: gluster-devel@gluster.org Sent: Tuesday, November 24, 2015 6:47:44 AM Subject: [Gluster-devel] Caching support in glusterfs While searching for caching support in glusterfs I stumbled upon this link: http://www.gluster.org/community/documentation/index.php/Features/caching But I didn't get much info from it. What is plan ahead? What aspects of caching support would you be interested in? We'll be interested in client-side caching support. As Jeff mentioned, can you please elaborate more on supporting caching in Ganesha and Samba? Regards, Avik HGST E-mail Confidentiality Notice & Disclaimer: This e-mail and any files transmitted with it may contain confidential or legally privileged information of HGST and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited. If you have received this e-mail in error, please notify the sender immediately and delete the e-mail in its entirety from your system. ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel
Re: [Gluster-devel] Caching support in glusterfs
- Original Message - > From: "Avik Sil" > To: gluster-devel@gluster.org > Sent: Tuesday, November 24, 2015 6:47:44 AM > Subject: [Gluster-devel] Caching support in glusterfs > > While searching for caching support in glusterfs I stumbled upon this > link: > http://www.gluster.org/community/documentation/index.php/Features/caching > > But I didn't get much info from it. What is plan ahead? > What aspects of caching support would you be interested in? Thanks, Vijay ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel
Re: [Gluster-devel] Caching support in glusterfs
On November 24, 2015 at 6:47:59 AM, Avik Sil (avik@hgst.com) wrote: > While searching for caching support in glusterfs I stumbled upon this > link: > http://www.gluster.org/community/documentation/index.php/Features/caching > > But I didn't get much info from it. What is plan ahead? There is some ongoing work on creating and improving the support necessary to support caching/delegations in Ganesha (NFS) and Samba (SMB). Perhaps members of those teams could elaborate. Unfortunately, there’s no current work on using those same features to create a generalized caching layer within “core” (native protocol) GlusterFS itself. While there’s broad agreement that it would be useful, such an effort requires someone to lead/drive it and nobody has stepped up to do so. ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel
[Gluster-devel] Caching support in glusterfs
While searching for caching support in glusterfs I stumbled upon this link: http://www.gluster.org/community/documentation/index.php/Features/caching But I didn't get much info from it. What is plan ahead? Thanks, Avik HGST E-mail Confidentiality Notice & Disclaimer: This e-mail and any files transmitted with it may contain confidential or legally privileged information of HGST and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited. If you have received this e-mail in error, please notify the sender immediately and delete the e-mail in its entirety from your system. ___ Gluster-devel mailing list Gluster-devel@gluster.org http://www.gluster.org/mailman/listinfo/gluster-devel
