Date: Wed, 20 Feb 2013 02:14:47 +0100 From: Fleuriot Damien <ml@my.gd> To: "bsd@todoo.biz" <bsd@todoo.biz> Cc: Liste FreeBSD <freebsd-questions@freebsd.org> Subject: Re: ZFS + iSCSI architecture Message-ID: <A1618B03-9CA6-46F9-89CA-7DB38B5D6ECA@my.gd> In-Reply-To: <93B2D1C4-8887-45F9-9939-A099AC5E3DA0@todoo.biz> References: <93B2D1C4-8887-45F9-9939-A099AC5E3DA0@todoo.biz>
next in thread | previous in thread | raw e-mail | index | archive | help
On Feb 19, 2013, at 11:20 PM, "bsd@todoo.biz" <bsd@todoo.biz> wrote: > Hello, >=20 >=20 > 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.=20 >=20 >=20 > The idea behind all that was to grant 5 or six critical servers access = to the NAS so that they can take advantage of :=20 >=20 > 1. space available on the NAS >=20 > 2. ability of the NAS to use ZFS and of clients to support this file = system (including snapshots)=20 >=20 > 3. Access the server using iSCSI (at least this is what I initially = planned).=20 >=20 > 4. Mount part of their filesystem using data stored on the SAN (like = /usr/local/ or other parts of the system).=20 >=20 >=20 >=20 > The server accessing the data will be of two types :=20 >=20 > 1. 2 x Ubuntu server 10.04 LTS=20 >=20 > 2. 4 x FreeBSD (mainly 8 and 9) with jail configured=20 >=20 >=20 > I have started reading about iSCSI and potential problems with = FreeBSD.=20 >=20 What problems do you mean ? > So my main questions would be :=20 >=20 >=20 > =95 Should I go for iSCSI ?=20 >=20 Well in all use cases, iscsi should perform faster than NFS. > =95 Should I rather choose / prefer NFS ?=20 >=20 > =95 Should I export a Volume as UFS rather than ZFS (is ZFS supported = as a target) ? >=20 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 >=20 > The main idea is stability, redundancy of data and ease of maintenance = (in a headless FreeBSD / Linux world) before anything else !=20 >=20 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. >=20 >=20 > That's the big pictures, if you have any pointers, advise, they are = all welcome.=20 >=20 >=20 > 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))=85=20 >=20 This is idd a very interesting topic and I hope to see more :) >=20 > Thx very much for your infos and feedback.=20
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?A1618B03-9CA6-46F9-89CA-7DB38B5D6ECA>