<div dir="ltr">I can echo the sentiment, lived with a horrible memory leak on FUSE mounted glusterfs all the way from some 3.X version (I think it went bad on 3.7, but cannot remember) through 4.x on a period of 2+ years, where the only solution was to reboot the servers every 15 to 30 days to clear the memory (servers have 64GB of RAM). After the latest upgrades of version 4.x, the reboot had to be done every 15 days. Finally on 6.6 the issue seems fixed (knock on wood).<div><br></div><div><span style="font-family:monospace"><span style="color:rgb(0,0,0)"># free
</span><br> total used free shared buff/cache available
<br>Mem: 65771848 16740376 7500048 755468 41531424 47707444
<br>Swap: 0 0 0
<br>[root@hostname ~]# uptime
<br> 07:05:49 up 31 days, 8:47, 1 user, load average: 0.40, 0.36, 0.33<br></span><div><br></div><div>If I had been running 4.x series on the above example, gluster would had already eaten 40GB-50GB of RAM and the server would probably have about 5GB free at best, if it hadn't already started miss-behaving after 2 weeks.</div><div><br></div><div>I have had success running MooseFS Pro, I am using the "unreleased" 4.x branch, which we got for use in an Educational institution. Have not had any issues with it. If it wasn't for the elevated cost, I would had already replaced every other instance of glusterfs I run with MooseFS.</div><div><br></div><div>My takeaway is that things get eventually fixed, but I have suffered through a lot using glusterfs and Samba. There have been many different combinations of glusterfs and the samba vfs gluster plugin that have stolen my peaceful sleep. To this date, I have never gone back to using the samba vfs gluster plugin after a catastrophe where it broke on a samba upgrade and then nobody could write files back to the servers via samba. That is when I changed over to FUSE mounts and then lived with the memory leak problems for so long.</div><div><br></div><div>Diego</div><div><br></div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 12, 2020 at 2:23 AM Hari Gowtham <<a href="mailto:hgowtham@redhat.com">hgowtham@redhat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi,</div><div><br></div><div>Stefan, sorry to hear that things are breaking a lot in your cluster, please file a bug(s) with the necessary information so we can take a look.</div><div>If already filed, share it here so we are reminded of it. Fixing broken cluster state should be easy with Gluster. <br></div><div>There are a few older threads you should be able to find regarding the same. <br></div><div><br></div><div>Do consider the facts that the devs are limited in bandwidth. we do look at the issues and are fixing them actively.</div><div>We may take some time expecting the community to help each other as well. If they couldn't resolve it we get in try to sort it out.<br></div><div>FYI: You can see dozens of bugs being worked on even in the past 2 days: <a href="https://review.gluster.org/#/q/status:open+project:glusterfs" target="_blank">https://review.gluster.org/#/q/status:open+project:glusterfs</a></div><div>And there are other activities happening around as well to make gluster project healthier. Like Glusto. We are working on this testing framework <br></div><div>to cover as many cases as possible. If you can send out a test case, it will be beneficial for you as well as the community.<br></div><div><br></div><div>We don't see many people sending out mails that their cluster is healthy and they are happy (not sure if they think they are spamming. <br></div><div>which they won't be. It helps us understand how well things are going).</div><div>Thanks Erik and Strahi, for sharing your experience. It means a lot to us :)<br></div><div>People usually prefer to send a mail when something breaks and that's one main reason all the threads you read are creating negativity.</div><div><br></div><div>Do let us know what is the issue and we will try our best to help you out.</div><div><br></div><div>Regards,</div><div>Hari.<br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 12, 2020 at 11:58 AM Strahil Nikolov <<a href="mailto:hunter86_bg@yahoo.com" target="_blank">hunter86_bg@yahoo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On February 12, 2020 12:28:14 AM GMT+02:00, Erik Jacobson <<a href="mailto:erik.jacobson@hpe.com" target="_blank">erik.jacobson@hpe.com</a>> wrote:<br>
>> looking through the last couple of week on this mailing list and<br>
>reflecting our own experiences, I have to ask: what is the status of<br>
>GlusterFS? So many people here reporting bugs and no solutions are in<br>
>sight. GlusterFS clusters break left and right, reboots of a node have<br>
>become a warrant for instability and broken clusters, no way to fix<br>
>broken clusters. And all of that with recommended settings, and in our<br>
>case, enterprise hardware underneath.<br>
><br>
><br>
>I have been one of the people asking questions. I sometimes get an<br>
>answer, which I appreciate. Other times not. But I'm not paying for<br>
>support in this forum so I appreciate what I can get. My questions<br>
>are sometimes very hard to summarize and I can't say I've been offering<br>
>help as much as I ask. I think I will try to do better.<br>
><br>
><br>
>Just to counter with something cool....<br>
>As we speak now, I'm working on a 2,000 node cluster that will soon be<br>
>a<br>
>5120 node cluster. We're validating it with the newest version of our<br>
>cluster manager.<br>
><br>
>It has 12 leader nodes (soon to have 24) that are gluster servers and<br>
>gnfs servers.<br>
><br>
>I am validating Gluster7.2 (updating from 4.6). Things are looking very<br>
>good. 5120 nodes using RO NFS root with RW NFS overmounts (for things<br>
>like /var, /etc, ...)...<br>
>- boot 1 (where each node creates a RW XFS image on top of NFS for its<br>
> writable area then syncs /var, /etc, etc) -- full boot is 15-16<br>
> minutes for 2007 nodes.<br>
>- boot 2 (where the writable area pre-exists and is reused, just<br>
> re-rsynced) -- 8-9 minutes to boot 2007 nodes.<br>
><br>
>This is similar to gluster 4, but I think it's saying something to not<br>
>have had any failures in this setup on the bleeding edge release level.<br>
><br>
>We also use a different volume shared between the leaders and the head<br>
>node for shared-storage consoles and system logs. It's working great.<br>
><br>
>I haven't had time to test other solutions. Our old solution from SGI<br>
>days (ICE, ICE X, etc) was a different model where each leader served<br>
>a set of nodes and NFS-booted 288 or so. No shared storage.<br>
><br>
>Like you, I've wondered if something else matches this solution. We<br>
>like<br>
>the shared storage and the ability for a leader to drop and not take<br>
>288 noes with it.<br>
><br>
>(All nodes running RHEL8.0, Glusterfs 72, CTDB 4.9.1)<br>
><br>
><br>
><br>
>So we can say gluster is providing the network boot solution for now<br>
>two<br>
>supercomputers.<br>
><br>
><br>
><br>
>Erik<br>
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<br>
Hi Stefan,<br>
<br>
It seems that devs are not so active in the mailing lists, but based on my experience the bugs will be fixed in a reasonable timeframe. I admit that I was quite frustrated when my Gluster v6.5 to v6.6 upgrade made my lab useless for 2 weeks and the only help came from oVirt Dev, while gluster-users/devel were semi-silent.<br>
Yet, I'm not paying for any support and I know that any help here is just a good will.<br>
I hope this has nothing in common with the recent acquisition from IBM, but we will see.<br>
<br>
<br>
There is a reason why Red Hat clients are still using Gluster v3 (even with backports) - it is the most tested version in Gluster.<br>
For me Gluster v4+ compared to v3 is like Fedora to RHEL. After all, the upstream is not so well tested and Gluster community is taking over here - reporting bugs, sharing workarounds, giving advices .<br>
<br>
Of course, if you need rock-solid Gluster environment - you definately need the enterprise solution with it's 24/7 support.<br>
<br>
Keep in mind that even the most expensive storage arrays break after an upgrade (it happened 3 times for less than 2 weeks where 2k+ machines were read-only, before the vendor provided a new patch), so the issues in Gluster are nothing new and we should not forget that Gluster is free (and doesn't costs millions like some arrays).<br>
The only mitigation is to thoroughly test each patch on a cluster that provides storage for your dev/test clients.<br>
<br>
I hope you didn't understand me wrong - just lower your expectations -> even arrays for millions break , so Gluster is not an exclusion , but at least it's OpenSource and free.<br>
<br>
Best Regards,<br>
Strahil Nikolov<br>
<br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr">Regards,<br>Hari Gowtham.</div>
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