On 02/08/2015 02:44 AM, Sam M via smartos-discuss wrote:
Hello.
I'm considering using Gluster or something similar on my VMs. I'd like
to get the opinion of this community on whether this would be a good
choice or if there's anything similar I should also consider.
Hi Sam:
We've used Gluster for many years on Linux systems. Over the last
year, we've been migrating all of our old customer GlusterFS setups to
other technologies. The big issue in our minds has been lost files.
We'd identified this problem in the 2.x releases, submitted bug
reports. This was prior to the Red Hat acquisition. Those bug reports
had been closed with no action.
These lost files occurred with such regularity that we developed
tools specifically designed to build what amounted to a diff between
directories of backing store and the gluster file system. See
http://download.scalableinformatics.com/gluster/utils/ . Note the date
on those tools.
It should be noted that I have seen people report lost files (not in
split brain scenarios) as recently as this weekend.
Also, I don't see any Gluster related packages in the repository. Is
anyone else using Gluster on SmartOS VMs? My research thus far leads
me to believe I should be able to build the required packages on
SmartOS. If someone knows otherwise, please let me know.
We would recommend against using GlusterFS for storage, even in an
LX-branded zone.
BTW I'm more an end user rather than a developer.
Higher level question: What problem are you trying to solve, and how
does Gluster fit the solution requirements? There may be other options
that are worth considering.
In general, distributed file systems are very hard to get right. If you
need a distributed file system for some part of your work, you need to
chose carefully, and make implementation choices that specifically
protect you. We've seen far too many implementations of "silver bullet"
technologies in such a way that it (predictably) blows up at a later date.
Thanks.
Sam
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