Re: [Iscsitarget-devel] Next release?

[Marko K. <mar...@ar...>]

Hi,

Yes, I'm very satisfied for now.

My configuration:

5x iSCSI target servers
12x ESXi servers

---

iSCSI target servers:
hw: HP DL320s, 2.4 GHz dual-core proc, 2 GB RAM, 12x 750 GB SATA, RAID5, 256 MB write-cache battery protected; dedicated 2x Gbit NICs for iSCSI 
sw: Centos 5.7 64bit; iscsitarget-1.4.20.2
ext4 optimized partition (mkfs.ext4 -b 4096 -I 256 -Ouninit_groups,flex_bg -G 64 /dev/cciss/c0d1)
mount -v -o data=writeback,nodelalloc -t ext4
created 7TB file: dd if=/dev/zero of=/iscsi/iscsi.file.7TB bs=1M count=734003

Target iqn.2011-09.si.arctur:iscsi-prod-01
        Lun 0 Path=/iscsi/iscsi.file.7TB,Type=fileio,IOMode=wb,ScsiId=iscsi-prod-01,ScsiSN=iscsi-prod-01
        Alias iscsi-prod-01
        InitialR2T No
        ImmediateData Yes
        MaxBurstLength 262144
        FirstBurstLength 262144
        MaxRecvDataSegmentLength 131072
        MaxXmitDataSegmentLength 131072
        DefaultTime2Retain 0

---

ESXi servers:
hw: HP DL360; 2x quad-core 3.0 GHZ, 16 GB RAM
sw: latest&updated ESXi 5.0 installed on USB stick; dedicated 2x Gbit NICs for iSCSI
net: distributed vSwitch, iSCSI configuration: one portgroup per iSCSI "channel" on separate /24 subnet (that is total two portgroups, each on its own subnet); Round-Robin multi-pathing.
storage: created storage cluster out of 4 iSCSI target servers, 5'th is dedicated for vmware data recovery appliance backups

Performance: 220+ MB/s on sequential read and sequentila write from Win2008R2 guest (not bad, huh?)

vMontion tests: I've created 20 Win7 guests wint 1 GB RAM and 2 vCPU; configured HA+DRS cluster: when guests are idle, they are all put in three hosts; when I put load on them (cluster 3D rendering with 3Ds max backburner) DRS moves running machines to all of the hosts, when load stops, migrates them back... all works fine for now, haven't seen any errors with vMotion.

Sum: thing are working great for now, perfomance is good, no errors at all. I do howerver wish for the PR implemented in IET before going to serious production...


Kind regards, Marko Kobal


-----Original Message-----
From: Yucong Sun (叶雨飞) [mailto:sun...@gm...] 
Sent: Sunday, November 27, 2011 7:32 AM
To: Marko Kobal
Cc: iscsitarget-devel
Subject: Re: [Iscsitarget-devel] Next release?

Hi Marko,

Are you using IET with Esxi 5 now? which version? and how well does it performance?

Cheers.

2011/11/23 Marko Kobal <mar...@ar...>:
> Hi,
>
> Well, it would really be great to see a stable release with persistent 
> reservation implemented!
>
> p.s.: for us, who are using VMware, it would also be great to 
> implement the currently unsupported command, used by vSphere5:
>
> kernel: iscsi_trgt: scsi_cmnd_start(1045) Unsupported 93
> kernel: iscsi_trgt: cmnd_skip_pdu(459)
>
> How much effort is needed to achieve this?
>
>
> Kind regards, Marko Kobal
>
>
> -----Original Message-----
> From: Yucong Sun (叶雨飞) [mailto:sun...@gm...]
> Sent: Monday, November 21, 2011 12:03 AM
> To: iscsitarget-devel
> Subject: [Iscsitarget-devel] Next release?
>
> Hi,
>
> I saw the good news about persistent reservation implemented in the 
> chunk, do we want roll out a new version with that?
>
> Cheers.
>
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> security threats, fraudulent activity, and more. Splunk takes this 
> data and makes sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-novd2d
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