tag:blogger.com,1999:blog-2890503559617005376.post430726722014547655..comments2018-05-22T04:19:47.153-07:00Comments on Confessions of a Linux Penguin: End of the FreeBSD ZFS experimentEric Lee Greenhttp://www.blogger.com/profile/12350104299041375832noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-2890503559617005376.post-7644522508551586962013-06-03T15:09:42.386-07:002013-06-03T15:09:42.386-07:00The problem is that the FreeBSD iSCSI initiator la...The problem is that the FreeBSD iSCSI initiator lacks immediate data mode. This is a one-CDB write mode. Without that, it has to do multiple TCP/IP turnarounds to do a single write, which is ridiculously slow. <br /><br />ZFS On Linux has now reached production quality, for some definitions of "production". It still has some performance issues with streaming performance (as testing elsewhere on this blog indicate), but for certain applications is quite usable. I am not, unfortunately, in a position to do testing with FreeBSD to compare performance of the two. <br /><br />I don't know whether btrfs is ever going to be "ready". I have thus far been underwhelmed by btrfs, it appears to be a bad clone of ZFS, with the exception that it has much better streaming performance on Linux. I do believe that in recent kernels (3.8/3.9) if you stay away from the new functionality it's as stable as anything else on Linux other than ext4 (which due to its fixed allocation areas will always be more reliable than something that relies on dynamic allocation). <br />Eric Lee Greenhttps://www.blogger.com/profile/12350104299041375832noreply@blogger.comtag:blogger.com,1999:blog-2890503559617005376.post-71317019818514190802013-06-03T15:00:58.850-07:002013-06-03T15:00:58.850-07:00Shoot.
On xenserver, it is a nightmare to get fre...Shoot.<br /><br />On xenserver, it is a nightmare to get freebsd to be a fully-PV VM like my ubuntu servers.<br />But it's so good at ZFS. But it sucks as iscsi!<br /><br />My ubuntu servers are great with iscsi. Easy in xenserver, but the zfs thing is a big question mark. We've played with ZOL and ZFS Fuse, and they both worked well but not as fast as FreeBSD.... then there's the whole "do i want to trust it on production" thing.<br /><br />I wish btrfs was ready.Jamiehttps://www.blogger.com/profile/16344348277203345239noreply@blogger.com