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</head><body bgcolor="#FFFFFF" text="#000000">It is also important to
note that there is wasted space with ZFS as is right now if you use
advanced format drives (usually 2TB or larger). When using ashift=12
(4k sector size) to create a ZFS raid, you'll lose about 10-20% of your
disk capacity with ZFS depending on the RAID type, I don't remember if
this affects stripes or not. It is most noticeable in my testing on a
RAIDZ2. When using ashift=9 (512 sector size), you'll have the full
capacity but performance will suffer on advanced format drives. <br>
<br>
I've also opened up a performance bug about the write performance and
amount of data written to the devices far exceeding the initial write
size which seems to be pretty noticeable when your writes don't align
perfectly with the zfs block size. I had an email with you about this.<br>
<br>
However, there are a lot of useful features in ZFS that may, or may not,
be worth this capacity loss and write performance limitations depending
on your use case. I have hopes the performance issues are being worked
out with the upcoming releases.<br>
<br>
<blockquote style="border: 0px none;"
cite="mid:CALgsdbeR182sA_dpgZ5eq3ty_ttQphd4o2=y1Nmhkdhv9X5Z0Q@mail.gmail.com"
type="cite">
<div style="margin:30px 25px 10px 25px;" class="__pbConvHr"><div
style="display:table;width:100%;border-top:1px solid
#EDEEF0;padding-top:5px"> <div
style="display:table-cell;vertical-align:middle;padding-right:6px;"><img
photoaddress="pavel.odintsov@gmail.com" photoname="Pavel Odintsov"
src="cid:part1.02080700.08040601@virtualcomplete.com"
name="compose-unknown-contact.jpg" height="25px" width="25px"></div> <div
style="display:table-cell;white-space:nowrap;vertical-align:middle;width:100%">
<a moz-do-not-send="true" href="mailto:pavel.odintsov@gmail.com"
style="color:#737F92
!important;padding-right:6px;font-weight:bold;text-decoration:none
!important;">Pavel Odintsov</a></div> <div
style="display:table-cell;white-space:nowrap;vertical-align:middle;">
<font color="#9FA2A5"><span style="padding-left:6px">Friday, January
9, 2015 3:39 PM</span></font></div></div></div>
<div style="color:#888888;margin-left:24px;margin-right:24px;"
__pbrmquotes="true" class="__pbConvBody"><div>Hello, everybody!<br><br>Do
somebody have any news about ZFS and OpenVZ experience?<br><br>Why not?<br><br>Did
you checked my comparison table for simfs vs ploop vs ZFS volumes?<br>You
should do it ASAP:<br><a class="moz-txt-link-freetext" href="https://github.com/pavel-odintsov/OpenVZ_ZFS/blob/master/openvz_storage_backends.md">https://github.com/pavel-odintsov/OpenVZ_ZFS/blob/master/openvz_storage_backends.md</a><br><br>Still
not interesting?<br><br>For example if you have 5Tb disk array (used up
to 90%) and using<br>ploop now you lose about 800GB of disk space!<br><br>This
data is from real HWN with few hundreds of containers.<br><br>I have
excellent experience and very good news about ZFS! ZFS on Linux<br>team
will add very important feature, linux quota inside container<br>(more
details here <a class="moz-txt-link-freetext" href="https://github.com/zfsonlinux/zfs/pull/2577">https://github.com/zfsonlinux/zfs/pull/2577</a><br><br>But
still no news about ZFS from OpenVZ team (and even from Virtuozza<br>Core)
and we can work separately :)<br><br>Fortunately, we do not need any
support from vzctl and can use "raw<br>vzctl" with some lightweight
manuals from my repo:<br><a class="moz-txt-link-freetext" href="https://github.com/pavel-odintsov/OpenVZ_ZFS/blob/master/OpenVZ_containers_on_zfs_filesystem.md">https://github.com/pavel-odintsov/OpenVZ_ZFS/blob/master/OpenVZ_containers_on_zfs_filesystem.md</a><br><br>I
collected all useful information here<br><a class="moz-txt-link-freetext" href="https://github.com/pavel-odintsov/OpenVZ_ZFS">https://github.com/pavel-odintsov/OpenVZ_ZFS</a><br><br>Stay
tuned! Join to us!<br><br></div></div>
</blockquote>
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