Date: Wed, 7 Feb 2024 13:24:29 +0100 From: Julien Cigar <julien@perdition.city> To: Andrea Brancatelli <andrea@brancatelli.it> Cc: fs@freebsd.org Subject: Re: ZFS on a shared iSCSI Message-ID: <nloyl5bv5xlh4x5sygl3ekibe7piy4tggidl4vzxczvypuayis@ea2qj3ylvb2s> In-Reply-To: <CAGqQmRPssfrb9S6r0H4SaQLEfOTp5Qx7-HSvHtYkxMnpeqKWjQ@mail.gmail.com>
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[-- Attachment #1 --] On Wed, Feb 07, 2024 at 11:55:54AM +0100, Andrea Brancatelli wrote: > Hello guys, I'm not 100% this is the correct list to ask this question, if > not please feel free to point me in the right direction. > > I was wondering what could be the best recipe to have an HA cluster sharing > an external ZFS storage. > > Let's say I have two servers running a bunch of Jails and, thus, I'd like > to use ZFS as the underlying storage layer and I have an external (iSCSI) > storage connected. > > Would it be "easily possible" to have some (2?) iSCSI LUN exposed to both > servers and then activate the pool on one or the other server? > > The idea would be to reactivate the filesystem from server A on server B if > the server A fails. > > Would it be "easier" to replicate everything and zfs send datas back and > forth? Clearly that would mean doubling datas and havin a scheduled replica > with a possible delay in data replication, so I'd like to avoid this. > > Any thoughts? I asked something similar a few years ago, the whole thread may be an interesting read: https://lists.freebsd.org/pipermail/freebsd-fs/2016-June/023456.html Just to say that I tried a lot of different things, and came up to the conclusion that for critical production usage all those things are fragile and with hidden dragons everywhere. I love FreeBSD (I use it exclusively everywhere, also at work), but there aren't any supported open-source solution for something like an "highly available ZFS cluster". On the commercial side there is RSF-1 and beasts like Pure storage ($$$) but ... I would really like to see CEPH ported to FreeBSD, that would be extremely useful Julien > > Thanks a lot. > > -- > *Andrea Brancatelli* -- Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEnF27CBNtOraRNmgqCLYqJMpBHmkFAmXDdnoACgkQCLYqJMpB HmkWCRAAxpLKKakPNDKjgqsrCUtD7T3wN5dxzzQrL/2ipRiG1Azt7Q179aFYqf5L H4n57+CZ8vfdE9xO7qV3v8HRN3M3JhtfF53JdzRh+s4VsIqLr1mLwvtiP9hsG3aL 3vfl50VDJamvR2qIdrdnwqNrSl9BrCK7ea6qGzRiyUB2yiLxXiOteOp7CT6GyDlV 9qFI2HGNXYNAytm3fBkmR71xsi2UcFYXtkSjkrFhD9k47SAu3VdK5APqGX1oj7QE a0v2rburG4BvbqyNuiy3U7LKFH18xY5l8HAXudiTLVzbNfPMRhgSsGYcqodIgFfH C3uNRG0+u1NDlt6Vh2MY+xvWC7CzAhZX8PkMBhPrq2PJo9keisd4qjhLXq1vBFaV MUFLZAnKz/H2WAh0bQ9PQsHMZhHWizvVdRXSy3hdIGj6A6B/xedR9j+ISzPcsthU s+6iA3rqIR4vbHDUTkbv85H7/yzmY9l6u9czYeVZX/ve1VwkYAh/XYKhZNsSgJjr BBG6eTX7QoONgnLYQSHzWneu3ainihxMk4c7PrQLUUD9oGMwsd1oR/APec5fEKtK vcpLeipmN45Rhy8nj4EHnuzy6/lQPfEs1MenbGMYBU5zNfPRqUR6ULbiMEksYWyV r8hJADa16cV5De4WRpg8Emo5zNWp5tdDBliKhwqHhyGdxpKsC2w= =dOEi -----END PGP SIGNATURE-----home | help
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