Date: Sun, 06 Sep 2015 23:13:05 -0700 From: Jordan Hubbard <jordanhubbard@icloud.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-fs@freebsd.org, Rakshith Venkatesh <vrock28@gmail.com>, Justin Clift <justin@gluster.org> Subject: glusterfs + FreeBSD [was Re: CEPH + FreeBSD] Message-ID: <382BA1FD-032E-4F21-9460-D2119340E21B@icloud.com> In-Reply-To: <838814506.1858817.1441577912291.JavaMail.zimbra@uoguelph.ca> References: <CANw0z%2BVhYCPNWrjByXLf8yO9wA0sc05_8eVJsM-McjcGNU9KQg@mail.gmail.com> <CA%2BKW7xQrN60kH37hu2Keja60a0huVjAyP6=SQNSrqus2EUMUMA@mail.gmail.com> <CANw0z%2BXrwK=6y%2BLpoiewc_eLDBYB5UZ5XpU6-YP0-K2FKwSa5w@mail.gmail.com> <A19FDEB5-1DEF-4EBF-8E9E-A1AD4688F1AA@icloud.com> <100306673.40344407.1441279047901.JavaMail.zimbra@uoguelph.ca> <1564D4FA-9BE1-4E37-8E91-F14A009D6B62@icloud.com> <838814506.1858817.1441577912291.JavaMail.zimbra@uoguelph.ca>
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[ Adding Justin Clift to CC line ] > On Sep 6, 2015, at 3:18 PM, Rick Macklem <rmacklem@uoguelph.ca> wrote: >=20 > Hmm. =46rom a quick look at their web page (I looked once before as = well), I don't > think RiakCS has what I need to do pNFS in a reasonable (for me) = amount of effort. > Two things that glusterFS has that I am hoping to use (and I don't = think RiakCS has > either of these) are: > - A Fuse file system interface which allows the kernel nfsd to access = the store as > a file system, so that it can provide the metadata services (NFS = without the reads/writes). > - A userland NFSv3 server in each node which will allow the node to = act as a data server. >=20 > If I am wrong and RiakCS does support a VFS file system interface (via = Fuse or ???), then > please correct me. You are not wrong. RiakCS is basically just a distributed object store = with an Amazon S3 compatible API. It doesn=E2=80=99t attempt to expose = the object store as a filesystem or provide any other modes of access to = it other than via S3 or its own =E2=80=9Cdatabase API=E2=80=9D since = it=E2=80=99s also (at its heart) a distributed database. In all fairness to Basho, I also think that was probably the right call. = It=E2=80=99s not a file system and doesn=E2=80=99t pretend to be one, = it=E2=80=99s just a distributed database that can store arbitrary = numbers (and sizes) of objects in a cluster with fault-tolerance, = multi-data center tenancy and so on (I also have no connection with = Basho so if it sounds like I=E2=80=99m trying to sales pitch it or = something, I=E2=80=99m not, I=E2=80=99m simply trying to be accurate in = describing it given that we=E2=80=99re also evaluating it as a possible = technology to incorporate into FreeNAS, for which the topic of = S3-compatible object storage comes up fairly frequently. Now glusterfs is another kettle of fish, and like I said, I think the = bigger question there is just what FreeBSD=E2=80=99s relationship with = it is. The https://wiki.freebsd.org/GlusterFS wiki was created over a = year ago and seems to be suffering from an overall lack of specific = goals. Does the FreeBSD project want glusterfs and/or is there anyone = in the FreeBSD community even interested in deploying it in a production = scenario? Is anyone willing to actually maintain a port, just as the = minimum price of admission? The bug tracking this, namely = https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D194409, has been = open for almost a year now and while it looks like =E2=80=98craig001=E2=80= =9D has been trying fairly hard to get 3.7.2 up and working, he=E2=80=99s = hitting some walls and it=E2=80=99s not even clear he=E2=80=99s in = contact with the right folks. As the previous glusterfs mail thread indicated, I was also happy to add = an earlier version of his port to the FreeNAS repo and play with it = there, though I was forced to take it back out of FreeNAS when we ran = into a number of issues just trying to make it work with the Linux = glusterfs reference VMs we set up. Should the underlying port get some = love again, it would be the simplest thing in the world for me to = refresh our copy of it and uncomment the line which adds glusterfs to = the FreeNAS manifest (and being a storage appliance, it=E2=80=99s rather = of an obvious test bed for this since people running FreeNAS are also = the target audience for technologies like this). If getting glusterfs up as a stable, working substrate is also a = prerequisite for getting pNFS, then I think a lot of us in the storage = industry would be the first to say =E2=80=9CWhat do we have to do? How = can we help?=E2=80=9D I already volunteered to send Rick an AMD64 = architecture machine for development, but I suspect that=E2=80=99s = actually the least of our obstacles right now. :-) - Jordan
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