Hi Federico, I'm not a dev, but based on my admin experience Gluster has some weaknesses:
- Negative lookup is bad , so if we got a fast way to identify a missing file would be nice - but this will be against the nature of Gluster and it's decentralised approach to metadata - Small file performance boost is also a good one, as currently working with small files is not as fast as some users would like to. Checking the contents of a dir that is having 50000 small files is taking multiple times than the response of the bricks. For example XFS responds for 0.2 secs while FUSE needs at least 3 sec (replica volume). - Performance tuning is quite hard, so anything that could help the admin to set the optimal settings would help alot. Best Regards, Strahil Nikolov На 11 юни 2020 г. 15:00:01 GMT+03:00, gluster-devel-requ...@gluster.org написа: >Send Gluster-devel mailing list submissions to > gluster-devel@gluster.org > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.gluster.org/mailman/listinfo/gluster-devel >or, via email, send a message with subject or body 'help' to > gluster-devel-requ...@gluster.org > >You can reach the person managing the list at > gluster-devel-ow...@gluster.org > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Gluster-devel digest..." > > >Today's Topics: > > 1. Introducing me, questions on general improvements in gluster > re. latency and throughput (Federico Strati) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Thu, 11 Jun 2020 09:51:52 +0200 >From: Federico Strati <strati.feder...@gmail.com> >To: gluster-devel@gluster.org >Subject: [Gluster-devel] Introducing me, questions on general > improvements in gluster re. latency and throughput >Message-ID: <0c283930-ebb7-4cc0-a063-2fb40a8b8...@gmail.com> >Content-Type: text/plain; charset=utf-8; format=flowed > >Dear All, > >I just started working for a company named A3Cube, who produces HPC >supercomputers. > >I was assigned the task to investigate which improvements to gluster >are >viable > >in order to lead to overall better performance in latency and >throughput. > >I'm quite new to SDS and so pardon me if some questions are naive. > > From what I've understood so far, possible bottlenecks are > >in FUSE and transport. > >Generally speaking, if you have time to just drop me some pointers, > >1] FUSE + splice has never been considered (issue closed without real >discussions) > >(probably because it conflicts with the general architecture and in >particular > >with the write-behind translator) > >Recently, it has been announced a new userspace fs kernel module, ZUFS, > >whose aim > >is to zero copy and improving vastly over FUSE: would you be interested > >in investigating it ? > >(ZUFS: https://github.com/NetApp/zufs-zuf ; >https://lwn.net/Articles/756625/) > >2] Transport over RDMA (Infiniband) has been recently dropped: > >may I ask you what considerations have been made ? > >3] I would love to hear what you consider real bottlenecks in gluster > >right now regarding latency and thruput. > >Thanks in advance > >Kind regards > >Federico > > > >------------------------------ > >_______________________________________________ >Gluster-devel mailing list >Gluster-devel@gluster.org >https://lists.gluster.org/mailman/listinfo/gluster-devel > >End of Gluster-devel Digest, Vol 75, Issue 4 >******************************************** _______________________________________________ Community Meeting Calendar: Schedule - Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC Bridge: https://bluejeans.com/441850968 Gluster-devel mailing list Gluster-devel@gluster.org https://lists.gluster.org/mailman/listinfo/gluster-devel
