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[01:05:25] <rnigam> I am using Citrix Xen Server 5.6 FP1 and I am getting  really bad netperf numbers between two vm's. A throughput of 46.43 Mbps for the run:  netperf -H xen-ubuntu-vm2 -l 60 -t TCP_STREAM -- -m 8192 -M 8192 -s 32768 -S 32768. Can someone help me figure out what is wrong. I am getting 1200Mbps for the same set up using Esxi.
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[01:15:35] <kdavy> rnigam: what guest operating systems?
[01:16:52] <kdavy> ah, ubuntu. it sounds like you're running in HVM mode, not with a PV kernel
[01:20:11] <rnigam> kdavy: Even for a HVM aren't those numbers bad? Also, where in XenCenter can i know if its a hvm or a pv? Sorry if I sound naive, new to Xen Server.
[01:21:52] <kdavy> rnigam, easiest way would probably be to check your kernel in the guests. if it ends in -generic, it's HVM; if it ends with -xen, it's PV
[01:22:36] <kdavy> i'm not big on linux guests in XenServer myself - all my guests are windows. but if you were running a PV kernel you'd probably know it already
[01:22:58] <kdavy> it's not that straightforward to convert a ubuntu guest to PV
[01:24:10] <kdavy> and those numbers sound about right for non-optimized HVM without Xen drivers - you'd get about the same performance on a Windows guest without XenTools i think
[01:24:53] <kdavy> i think i even remember something about non-optimized guests essentially having 100Mbps half-duplex vNics - there's your 46Mbps
[01:26:10] <rnigam> kdavy: so what are the best numbers I can get if I optimize the guest? How do I actually optimize them?
[01:26:23] <rnigam> the HVM guest i mean !
[01:27:16] <kdavy> rnigam, good question. theoretically you should be able to reach near-physical speed
[01:27:48] <kdavy> but i think for linux VMs, you just have to run them as PV. HVM optimized drivers are for Windows operating systems
[01:29:48] <rnigam> kdavy: so of I want to run a pv guest over my xen server, how do i do it? I will have to look for already modified and pv optimized ubuntu vm's on the web?
[01:30:45] <rnigam> Does Citrix provide any PV Virtual Appliances ?
[01:31:02] <kdavy> rnigam: http://www.aikidokatech.com/?p=55
[01:31:14] <kdavy> something along those lines, depending on your ubuntu version
[01:31:45] <kdavy> Citrix don't provide appliances, but they do provide templates. i don't know how well the templates work though
[01:40:13] <rnigam> kdavy: Wow... That's some work to get the ubuntu running in pv mode. I am curious to know what Esxi is doing different that I could easily install and configure my ubuntu guests in no time without worrying about hvm or pv ! As i mentioned before I have great numbers too !
[01:43:03] <rnigam> kdavy: Have you read anywhere about xentools not getting installed on the hvm guests (or for any vm general)? I am installing and rebootng the vm only to see in XenCenter that they are not installed.
[02:02:37] <kdavy> rnigam, i've had one windows vm that kept doing this, not sure why. i ended up just wiping it and redoing from scratch
[02:02:40] <kdavy> other than that no
[02:05:36] <rnigam> kdavy:Thanks for all the help so far!
[02:07:03] <kdavy> rnigam: no problem
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[03:26:04] <rnigam> kdavy: I see 900Mbps with xen-pv compared to 46 mbps with xen-hvm. Is that about right?
[03:29:31] <kdavy> yeah, on GigE without bonding/load balancing, that sounds right
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[03:32:40] <rnigam> bonding can only be used if I have more than one physical nic?
[03:33:55] <rnigam> kdavy: Is there a link on how I can get more network through put out of my xen vm's?
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[03:43:36] <kdavy> rnigam, either bonding or 10GbE...
[04:18:40] <rnigam> kdavy: At present I have 10 GbE so I wil get more out of vms if I use bonding?
[04:22:13] <kdavy> rnigam: can't say for sure. you gotta find the bottlenecks and eliminate them one by one - bottleneck could be Dom0, disk, some network equipment, etc. it's hard to tell without seeing your setup
[04:22:59] <kdavy> basically you need to answer the question: why you are only getting 900Mbps when the system seems like it's capable of more?
[04:23:36] <rnigam> Kdavy: exactly !
[04:25:59] <rnigam> kdavy: any pointers on how can i go about this?
[04:27:25] <kdavy> rnigam, collect as much data as you can :) try different OS (Windows for example) and compare performance stats. Measure physical <-> physical and virtual <-> physical performance and compare to virtual <-> virtual
[04:27:48] <kdavy> there's not really a one size fits all solution.
[04:29:15] <kdavy> for starters, see if anything improves if you do your testing with jumbo frames; maybe try disabling all the offload mechanisms on the vNICs and/or pNICs - there are instructions on the internet on how to do that
[04:32:50] <rnigam> kdavy: Thanks
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[09:04:40] <crackguy> on a server with a 4 core 1 x Intel CPU 2.67GHz, what is the maximum number of VMs a Citrix XenServer can run without any major performance issues?
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[09:11:15] <crackguy> on a server with a 4 core 1 x Intel CPU 2.67GHz, what is the maximum number of VMs a Citrix XenServer can run without any major performance issues?
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[10:34:11] <drumline_> Anyone know if I can use the XenServer powershell cmdlets with Xen Open Source?
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[13:52:50] <tabularasa> morning peeps
[14:05:00] <Carpe|Diem> mornin
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[14:38:03] <splatone> M0rning.
[14:38:50] <splatone> tabularasa: How many hours did it take you to build the AD template to build AD servers.
[14:39:08] <tabularasa> i built a standard windows server template... took me a couple hours
[14:39:22] <tabularasa> or did you mean the GPO template ?
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[14:40:17] <splatone> tabularasa: that too.
[14:40:25] <splatone> im sure you just copied GPO's
[14:40:59] <tabularasa> yeah
[14:41:06] <splatone> so do you add the AD role afte the server comes up.
[14:41:15] <splatone> but Yea total how long do you think it took you.
[14:41:16] <tabularasa> well the GPOs took a long time cause it was all new R2 policies and a shitload of testing
[14:41:28] <tabularasa> and yes, add the AD role after server comes back up
[14:41:35] <tabularasa> shit, i probably spent 80 hours tweaking the AD
[14:41:41] <splatone> Yea I have some R2 GPO's built already..
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[14:42:22] <splatone> If you take the individual gpo tweeking out of it how long did it take you to built the AD template that uses the GPOS..
[14:42:31] <tabularasa> a couple hours
[14:42:41] <splatone> and How much time do you think staging saves you over building the AD individually.
[14:42:43] <tabularasa> install and update windows... turn into template... done
[14:42:59] <tabularasa> remember, we are on vmware.. it has integrated sysprep
[14:43:11] <tabularasa> what do you mean?
[14:43:33] <splatone> ok so your just doing a standard R2 install and kicking off the AD role after the server comes up.
[14:43:40] <tabularasa> yeah
[14:43:42] <tabularasa> meeting.. bbiab
[14:43:49] <splatone> No worries.
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[15:25:25] <tabularasa> bak
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[15:29:48] <drumline_> Anyone know the xe command to see whether or not XenMotion happened on XenServer?
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[15:49:40] <tabularasa> LTE has come to Columbia.... woot!
[15:49:53] <tabularasa> Got 18Mbps on my phone this morning
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[17:28:19] <Rienzilla> holy moly
[17:28:21] <Rienzilla> fuck me
[17:35:15] <tabularasa> heh
[17:47:55] <Rienzilla> my xenservers create clones of running servers
[17:48:32] <Rienzilla> it doesn't show up in the UI, it doesn't show up anywhere, it's only detectable by disappearing changes in the server's filesystem
[17:56:19] <splatone> tabularasa: what tkt system do you guys use?
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[18:05:54] <kdavy[1]> morning all
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[18:33:57] <JarianGibson> hey kdavy
[18:34:06] <JarianGibson> that xenserver issue pool went boom
[18:34:09] <JarianGibson> lost pool master
[18:34:12] <JarianGibson> issues with stroage
[18:34:19] <JarianGibson> back up but fun saturday afternoon
[18:39:12] <kdavy_> JarianGibson, heh that sounds familiar :)
[18:39:25] <zaf> that was my sunday
[18:39:47] <zaf> fun FP1 tcp/offload problems
[18:39:48] <kdavy_> xe emergency-designate-new-master or whatnot?
[18:40:11] <JarianGibson> yep
[18:40:13] <kdavy_> i've been moving VMs all night saturday, from 8pm to 6am nonstop
[18:41:03] <JarianGibson> New Pool Master
[18:41:04] <JarianGibson> xe host-emergency-ha-disable --force (if enabled)
[18:41:04] <JarianGibson> xe pool-emergency-transition-to-master
[18:41:04] <JarianGibson> xe pool-recover-slaves
[18:41:04] <JarianGibson> xe host-list
[18:41:06] <JarianGibson> Pool Slaves
[18:41:08] <JarianGibson> xe host-emergency-ha-disable --force (if enabled)
[18:41:11] <JarianGibson> xe pool-emergency-reset-master master-address=<new_master_hostname>
[18:41:17] <kdavy_> transitioned another vSphere farm to Nexenta
[18:41:37] <JarianGibson> after fixing storage
[18:41:40] <JarianGibson> issues
[18:42:15] <kdavy_> JarianGibson, yeah i've had to do that when writing recovery procedures for possible failure scenarios
[18:42:34] <kdavy_> what was wrong with storage?
[18:42:48] <JarianGibson> pathing issues, connections etc
[18:43:00] <kdavy_> hardware or software?
[18:43:12] <JarianGibson> ended up being hardware
[18:43:15] <kdavy_> software is more fun :)
[18:43:46] <JarianGibson> walking customer thru hardware over phone/gtm even more phone
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[18:44:25] <kdavy_> hmm, that's a case where a netbook with a webcam would help
[18:44:28] <kdavy_> and skype
[18:44:46] <JarianGibson> yep
[18:44:49] <kdavy_> especially one of those rotating webcams that you can turn to point in the other direction
[18:45:18] <kdavy_> i have one at my colo just in case
[18:45:40] <JarianGibson> that would be a big help
[18:45:42] <JarianGibson> very nice
[18:46:38] <kdavy_> maybe it's a good idea for you guys to send one to every large customer as a PR campaign :) it'll save you guys tons of time
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[18:49:51] <kdavy_> can't cost more than $300-ish per site
[18:50:11] <zaf> if you could make it type for you it would be worth it
[18:50:51] <zaf> if i had a nickel for every time i said NO, the BACKSLASH, or NO, the FORWARD slash
[18:51:01] <zaf> ...
[18:51:06] <kdavy_> :D
[18:52:09] <zaf> kdavy, http://www.nexenta.org/ ?
[18:55:52] <tabularasa> splatone: have a homebrew one.  Migrating to Cherwell
[18:56:32] <kdavy_> zaf, no, http://www.nexenta.com/ - the enterprise version with commercial plugins
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[18:57:10] <zaf> ah
[18:57:23] <zaf> it's basically a software SAN?
[18:57:34] <kdavy_> yes
[18:58:14] <kdavy_> well... any SAN is a software SAN - except in case of legacy SANs the software is obfuscated
[18:58:54] <zaf> good point
[18:59:12] <zaf> but you've gotta bring your own hardware, right?
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[19:03:06] <larstr> where can I find older versions of the citrix client
[19:03:07] <larstr> ?
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[19:03:59] <tabularasa> good question...
[19:04:06] <kdavy_> zaf, you can use your own hardware or get it from a VAR - either way works
[19:04:25] <kdavy_> building your own is cheaper but, of course, you have to know what you're doing
[19:04:29] <tabularasa> oldversion.com ?
[19:04:37] <tabularasa> i remember there was some site that had that crap
[19:06:47] <larstr> can't find anything citrix related on oldversion...
[19:07:21] <larstr> I need a version that works with RHEL4
[19:07:57] <larstr> and openmotif 2.2
[19:08:13] <larstr> newer versions require openmotif 2.3.1
[19:09:10] <tabularasa> ah, gotcha
[19:09:17] <tabularasa> thats annoying
[19:10:53] <larstr> yay.. look what I found: http://www.xenappblog.com/downloads/?category=2
[19:10:55] <larstr> :)
[19:11:46] <larstr> is there some minimum requirements for which client one must use to connect to an up 2 date farm?
[19:18:18] <tabularasa> larstr: nice
[19:18:38] <tabularasa> i should download all of those for citrixirc.com
[20:07:10] <drumline_> Anyone know something about the XenServer Powershell cmdlets and the XenServer Management API?
[20:07:53] <drumline_> Having trouble referencing VIF tables and VBD tables.  Referencing a specific OpaqueRef, the cmdlet reports that the object has been deleted.
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[21:05:03] <kdavy_> holy f$ck, my nexenta is reporting 600k read iops steady right now, with jumps up to 900k. iops to spindles: 500 (not 500k)
[21:08:49] <kdavy_> love the adaptive read cache
[21:15:19] <JarianGibson> cache anyone
[21:16:17] <kdavy_> JarianGibson, huh?
[21:19:14] <JarianGibson> that all in cache in your nexenta?
[21:19:26] <kdavy_> hm i just came up with a new term. Cache-22 - for those who rely on cache extensively
[21:19:39] <kdavy_> JarianGibson, yes.
[21:19:40] <JarianGibson> ha
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[21:52:40] <tabularasa> kdavy_: heh, nice
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[22:37:15] <kdavy_> awesome. my credit card info got stolen by someone.
[22:37:43] <kdavy_> at least my bank is paranoid enough to decline any suspicious transactions and lock the card immediately
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[23:07:07] <gazzo> aarrrghh
[23:07:17] <gazzo> "The Citrix SSL Server you have selected is not accepting connections"
[23:07:20] <gazzo> >_<
[23:07:33] <gazzo> all of our STAs and stuff seeeeeem ok
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