Le 20 févr. 2013 à 02:14, Fleuriot Damien <m...@my.gd> a écrit : > > On Feb 19, 2013, at 11:20 PM, "b...@todoo.biz" <b...@todoo.biz> wrote: > >> Hello, >> >> >> I am about to start deploying a large system (about 18 To which can grow up >> to 36 To) based on a big Intel platform with lot's of fancy features to have >> turbo boosted platform (ZIL on SSD + system on dongle if I go for FreeNAS). >> Since I want to move on quite fast I might decide to use FreeNAS in it's >> latest version. >> >> >> The idea behind all that was to grant 5 or six critical servers access to >> the NAS so that they can take advantage of : >> >> 1. space available on the NAS >> >> 2. ability of the NAS to use ZFS and of clients to support this file system >> (including snapshots) >> >> 3. Access the server using iSCSI (at least this is what I initially >> planned). >> >> 4. Mount part of their filesystem using data stored on the SAN (like >> /usr/local/ or other parts of the system). >> >> >> >> The server accessing the data will be of two types : >> >> 1. 2 x Ubuntu server 10.04 LTS >> >> 2. 4 x FreeBSD (mainly 8 and 9) with jail configured >> >> >> I have started reading about iSCSI and potential problems with FreeBSD. >> > > What problems do you mean ?
For example : - Can my client (the initiator) directly mount a ZFS volume on freeBSD using iSCSI or should I go back to formatting It to UFS ? - Is the iSCSI stack in FreeBSD stable an mature enough to be used in a production environment ? ==> It is out of scope to have kernel panic because of an unstable iSCSI related problem. > >> So my main questions would be : >> >> >> • Should I go for iSCSI ? >> > > Well in all use cases, iscsi should perform faster than NFS. Fast is good - stable is necessary in this case ! And this is what I am tring to evaluate… > >> • Should I rather choose / prefer NFS ? >> >> • Should I export a Volume as UFS rather than ZFS (is ZFS supported as a >> target) ? >> > > I'm not sure what you mean here, when you export a zvol over ISCSI: > - your SAN is the target and presents a block device (the zvol) > - your client is the initiator > - your client attaches to the ISCSI drive and formats it using filesystem > XYZ, be it ext3, ufs or ntfs > Thanks for this reminder about vocabulary for iSCSI, I'll try to stick to It ;-) > >> >> The main idea is stability, redundancy of data and ease of maintenance (in a >> headless FreeBSD / Linux world) before anything else ! >> > > ISCSI is a bit harder to setup IMO, however I think it''s more reliable than > NFS, what with its auto retries if it loses the network link to a device. > Have you deployed this in production and what are your concerns and recommendations ? > > >> >> >> That's the big pictures, if you have any pointers, advise, they are all >> welcome. >> >> >> It is quite late where I leave, so I will reply to posts in 8 to 10 hours, >> but I hope to have enough answer(s) to start an interesting thread (as I >> think this question is very interesting and not so clearly explained (at >> least in my mind))… >> > > This is idd a very interesting topic and I hope to see more :) > There is also an interesting (and fresh) post here : http://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSFreeBSDvsIllumos?showcomments#comments > >> >> Thx very much for your infos and feedback. > > ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ BSD - BSD - BSD - BSD - BSD - BSD - BSD - BSD - ________________________________________________ «?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§«?»¥«?»§ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ PGP ID --> 0x1BA3C2FD _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
