[zfs-discuss] ext3 on zvols journal performance pathologies?

2007-09-10 Thread Joshua Goodall
I've been seeing read and write performance pathologies with Linux ext3 over iSCSI to zvols, especially with small writes. Does running a journalled filesystem to a zvol turn the block storage into swiss cheese? I am considering serving ext3 journals (and possibly swap too) off a raw, hardware-mirr

Re: [zfs-discuss] chgrp -R hangs all writes to pool

2007-07-17 Thread Joshua . Goodall
[EMAIL PROTECTED] wrote on 17/07/2007 02:36:06 PM: > Running Solaris 10 Update 3 on an X4500 I have found that it is possible > to reproducibly block all writes to a ZFS pool by running "chgrp -R" > on any large filesystem in that pool. As can be seen below in the zpool > iostat output below, aft

Re: [zfs-discuss] zfs iscsi storage for virtual machines

2007-07-16 Thread Joshua . Goodall
[EMAIL PROTECTED] wrote on 17/07/2007 05:12:49 AM: > I'm going to be setting up about 6 virtual machines (Windows & > Linux) in either VMWare Server or Xen on a CentOS 5 box. I'd like to > connect to a ZFS iSCSI target to store the vm images and be able to > use zfs snapshots for backup. I have

[zfs-discuss] Wishlist items

2007-06-25 Thread Joshua . Goodall
I've been saving up a few wishlist items for zfs. Time to share. 1. A verbose (-v) option to the zfs commandline. In particular zfs sometimes takes a while to return from zfs snapshot -r tank/[EMAIL PROTECTED] in the case where there are a great many iscsi shared volumes underneath. A little pr