/srv/irclogs.ubuntu.com/2011/02/08/#ubuntu-za.txt

sakhimoonin06:17
superflyahoy sakhi06:30
Kilosmorning superfly  and other fellas07:01
KilosMaaz, coffee on07:02
* Maaz puts the kettle on07:02
MaazCoffee's ready for Kilos!07:06
KilosMaaz, ty07:06
MaazYou're Welcome I'm sure07:06
sakhiMaaz: tea on07:18
Maazsakhi: Sorry...07:18
Kiloslol hiya sakhi 07:18
sakhi:) only coffee07:19
Kilosyip07:19
=== smorar_ is now known as smorar
Kiloshi smorar 07:59
superflyhi Kilos08:22
inetprogood morning08:31
Kiloslo inetpro 08:31
superflytumbleweed: ping10:12
tumbleweedpong10:13
superflyare you a debian developer?10:14
superflyI recall something of the sort10:14
tumbleweedas of pretty recently, yes10:15
superflycongrats :-)10:15
tumbleweedthanks :)10:15
superflyalso, I might be asking you for some help in the near future, just to forewarn you ;-)10:15
Symmetriaheh11:08
Symmetriaso after a hell of a lot of analysis 11:08
Symmetriawe figured out what was killing the mirror.ac.za server 11:09
Symmetria(though we are still getting a new server in)11:09
linuxboyand, what was it?11:09
Symmetriathe box was dying the moment we had a ton of rsyncs running to sync from external points, divided the syncs so that the we trigger the syncs to kick off every hour for a different mirror, so the sync processes are now divided over the day to 24 different times and where we have more than 24 individual syncs or something has to sync more than once we just put 2 or 3 rsyncs kicking off at the same time11:10
Symmetriaand the box has been stable since then11:10
Symmetriawe were picking up a lot of wierd kernel panic errors specifically to do with rsync 11:10
Symmetriavery strange 11:10
linuxboywhy would you update all your mirrors at the same tiem?11:11
froztbytewhy not?11:12
linuxboyload11:13
linuxboybandwidth11:13
linuxboyCPU11:13
linuxboyIO11:13
froztbyteand if you have enough of all those?11:16
Symmetrialinuxbox originally it was about scheduling the updates to all happen after hours11:25
Symmetrialegacy configs 11:25
tumbleweedSymmetria: why run our mirrors with a scheduling engine that runs 3 syncs at a time11:25
Symmetriawe switched it to update any time because we have the bandwidth now to do it whenever 11:25
tumbleweed(given our bandwidth, 3 at a time makes sense, but with yours, 1/2 is probably more sane)11:25
tumbleweedthat way they also lock, so if for some reason (i.e. network issues) one day's syncs run over, they won't be stomped upon11:26
Symmetriayeah we're looking at that as well, though I think a lot of these issues will be solved by the new system thats been ordered as well11:26
tumbleweedSymmetria: btw which ftpd do you use?11:27
Symmetriathe new mirror.ac.za client facing system will allow us to move the current box into a backend sync system and segregate the two11:27
Symmetriatumble, pure-ftpd 11:27
tumbleweedvsftpd makes our kernel use an insane amount of memory when it's under heavy load11:27
Symmetriatumbleweed heh, did you see the specs of the new client facing server we have ordered?11:27
tumbleweedyeah that makes sense (split) if you have shared storage11:27
* tumbleweed can imagine, and doesn't want to :)11:27
Symmetriathat new server is... mind blowing :) 11:28
tumbleweedalso, if you have some free rackspace and don't mind some bandwidth use, debian is looking for a security.debian.org in ZA (but it'd have to be a box admined by them)11:28
Symmetriaheh its got 2 x 6 core 3.3ghz xeon cpus in it (so 12 cores total), 64gig of 1333mhz error correcting ram, high speed 600gig SAS disks in mirror config for the base operating system, 5 x PCI-E 16x slots for the Perc 5e external SAS system controllers to drive the disk arrays 11:29
tumbleweederr not in ZA, but in africa in genereal...11:29
Symmetriawe have the rack space, we'd require access to the box but they could admin it (we don't allow boxes on the backbone that we have zero access to for obvious reasons)11:29
Symmetriayou can tell them to email me 11:29
Symmetriaheh right now I'm trying to free up space on diskspace3 by moving stuff to the new SAN, but *SNORE* the amount of data I'm moving is taking a long long time11:31
tumbleweedwell, I can bounce you the request. I assume they'd be looking for hardware donations too (but those can come from elsewhere...)11:31
Symmetriamoved debian onto the new disk array which freed up 500gig but 500gig will last days the way some of the other mirrors are growing11:31
Symmetriahardware is not a problem, I have several servers we could probably throw at it11:31
Symmetriadependant on how much disk space they are looking for11:31
* Symmetria watches as a 7.5 terabyte single mirror copies from one san to the other 11:32
Symmetriaheh, its interesting, the mirrors which provide us the most grief are never the open source stuff 11:32
Symmetriaits the scientific data mirrors 11:32
Symmetria(in this case the human genome project mirror, which is *INSANELY* huge)11:33
Symmetriaheh and when they do an update release, you're looking at 300+gig churn (on an almost daily basis)11:33
Symmetriagbdb/mm9/multiz30way/phastCons30wayPlacental.wib11:34
Symmetria  1914580468 100%   60.45MB/s    0:00:30 (xfer#5134, to-check=206126/231289)11:34
tumbleweedthe open source stuff has had a while to learn how to be mirrored effectively11:34
Symmetriaheh look at the size of those files 11:34
Symmetriaand they are all that size, well, some of them are bigger11:34
Symmetriafile sizes ranging between 2 and 6 gigs a file11:34
Symmetria7.9T    /diskspace3/hg/11:35
Symmetriaheh11:35
Symmetriagawd damn11:35
tumbleweeddrubin: weechat keeps building sucessfully. I'm tempted to leave the team :)11:48
Symmetriatumbleweed btw11:48
Symmetriaif you ever want huge storage space11:48
Symmetriafor cheap (cheap by the standards of highly reliable storage)11:49
Symmetriathe dell MD1000 arrays are things of beauty11:49
Symmetriaheh, 28 terabyte active array on eSAS for like, 80 grand 11:49
Symmetriaand they are *FAST*11:49
tumbleweedSymmetria: LEG doesn't have that kind of cash :/ (we make do with software raid, and partial mirroring)11:54
Symmetria*nod* we spend the kinda money as do on mirror because its becoming more and more a critical service for academic data sets11:55
Symmetriait used to be a lot about saving bandwidth on the opensource stuff, and we will obviously continue to do that and treat it with the same priority as everything on the mirror11:56
Symmetriabut the academic data sets are becoming more and more critical, and getting bigger and bigger 11:56
tumbleweedit's actually a pity that there aren't decent raid solutions in the  10-20k range11:56
Symmetriatumbleweed just one piece of advice 11:57
tumbleweedopen source is running into the same issues. Debian is having to deal with academic datasets appearing in packages11:57
Symmetriano matter what anyone tells you, stay the hell away from anything iSCSI based 11:57
Symmetriawe've thrown test after test at it, as have a lot of other people I know11:58
Symmetriaand the performance BLOWS 11:58
tumbleweedhah11:58
Symmetriaeven with hardware offload iSCSI controllers (and I had some pretty damn expensive iSCSI hardware offloads)11:58
tumbleweedever played with ATAoE? it looks interesting but not that much hardware for it11:58
Symmetriaheh, we were testing with hardware offload cards that cost 10 grand a piece an the performance still blew 11:58
Symmetriatumbleweed, heh, havent played with it, I generally stick to the philosophy that ethernet was not meant as a disk carrying technology :P11:59
Symmetriaand people should stop trying to be cheap :P cause it doesnt work11:59
tumbleweedsounds reasonable :)11:59
Symmetriayou wanna throw shit like that over a network, use fiber channel11:59
Symmetriait was what it was designed for11:59
SymmetriaLOL, interestingly enough, while working on our DWDM units the other day, I discovered you can actually turn up 10G fiber channel lambdas12:00
Symmetriadirectly on the DWDM units12:00
Symmetriaonly a matter of time before I start offering that one to the clients12:00
drubinMaaz: weather for cape town15:02
Maazdrubin: In Cape Town, South Africa at 4:00 PM SAST on February 08, 2011: 24°C; Humidity: 61%; Wind: South at 41 km/h; Conditions: Partly Cloudy; Sunrise/set: 6:13 AM SAST/7:45 PM SAST; Moonrise/set: 10:58 AM SAST/10:09 PM SAST15:02
MorganvdKilos!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!16:11
MorganvdHI16:12
Symmetriaheh16:16
Symmetriawow, vendors can be real dodgy16:16
Symmetriawe did some testing on a hardware device, produced a report, the vendor saw the report, phones me, and begs me not to show that report to any other south african isp 16:17
Kiloshiya Morganvd sorry i am on p3 with no spound and trying to fix my 80g on p416:17
Morganvdlol16:17
SymmetriaIm like, errr, sorry, we're an open book, you dont like me disclosing what we find, dont ask me to test16:17
Morganvddid you sign a non disclosure?16:17
SymmetriaMorganvd hell no, if a vendor asks me to evaluate his product, we're transparent 16:18
Symmetriaanything I find in testing I will disclose16:18
Symmetriaand if they dont like that, I wont test their hardware and I wont buy their hardware16:18
Morganvdwell then you in your fullest of rights16:18
MorganvdSymmetria: if you have a few min later16:19
Morganvdi would like to ask your advice about something16:19
Symmetriaask away16:24
SymmetriaI got a second now16:24
Symmetriajust trying to plan a lab test and see what results I EXPECT to get bfore I start16:24
linuxboySymmetria: URL to test results plz17:07
Symmetriaheh linuxboy not publishign them on the web, but am prepared to discuss what we found the device couldnt do when asked by an ISP or anyone else17:11
Symmetria*shrug* very basically, we wanted to terminate pseudowires on svi's (switched virtual interfaces), the device doesnt seem to be able to do that, and unless we screwed up in our lab tests and they have some other way to do it, that makes the device unusable in the network17:12
Owkkurisuperfly: http://www.omgubuntu.co.uk/2011/02/android-apps-coming-to-non-android-phones-maybe-even-ubuntu/18:23
Symmetria*HRM*19:49

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