Hi Alejandro, I have not customized any sysctl parameters yet, but I'd be glad if you could give me some hints on what you did to make it work fine. I'll make some tests within this week and see if I can improve it. If not, I'll probably just send an utwall to the users telling them to be patient :-)
Thank you again for your help! 2014-07-04 19:17 GMT+01:00 Alejandro Soler <aso...@martinaditrento.com>: > Hi, Edwin > > I have one server with OEL6.3 with SRS5.4 and the times of mounts are > acceptable. > > Did you change sysctl.conf options (specialy network options).? > > > -- > > ------------------------------------ > Alejandro Soler > Administrador de Sistemas > Martina di Trento S.A. > Tel.: (011) 4000-7243 > Av.Pedro de Mendoza 2555 > (C1169AAJ) Buenos Aires - Argentina > > > ---------- Mensaje reenviado ---------- > From: Edwin Marqe <edwinma...@gmail.com> > To: jimkli...@cos.ru, SunRay-Users mailing list <sunray-users@filibeto.org > > > Cc: > Date: Fri, 4 Jul 2014 16:06:50 +0100 > Subject: [Marketing Mail] Re: [SunRay-Users] [Marketing Mail] utstoraged > takes too long to mount a storage device > Wow, thanks Jim for the accurate and detailed explaination! Indeed, this > seems to have much to do with the NTFS/FUSE combination, as when I try to > mount those external USB drives I could see a line in the log saying FUSE > was being used here. I also did some tests with the iostat and iotop tools, > and seems that in the time interval between the device being plugged in and > when it gets opened as a folder on the client side, there's a process of > 'nautilus --no-desktop <mountpoint>' running the 99% of the IO operations > of the server, so I guess this is the culprit. > > I also tried setting Alejandro's options, but it didn't seem to help. > > Any tips on why is that so expensive and how to reduce it a little bit? > > Again thank you guys! > > > 2014-07-01 18:29 GMT+01:00 Jim Klimov <jimkli...@cos.ru>: > >> One point in the question was the USB drive's filesystem. >> >> Typically one would see FAT (aka pcfs for Solaris hosts) or NTFS >> here, of which NTFS support in the Unixes is often done with an >> userspace FUSE driver layer which tends to be slow even with the >> faster devices (i.e. HDDs). USB Flash is rather slow as it is (raw), >> and being USB over Ethernet does not help things much ;) >> >> Of course it is valid to see ext* or ufs or whatever on flashes, >> but the other options are typically less portable and rarely used. >> >> Also, the "pcfs" in Solaris was historically also known to be >> sub-performant, so AFAIK both Solaris 11 and illumos had projects >> to rewrite it with a modern FAT supporting driver. But with your >> OL hosts this part does not matter. >> >> I'd expect this to be a problem with NTFS/FUSE, primarily. >> See if "iostat" and similar server-side tools yield anything >> interesting regarding the disk traffic while it is being mounted? >> >> As a second option, it might be some networking speed mismatch >> resulting in pathological bandwidths, though this would be also >> visible with interactive (graphics) part of your sessions, probably. >> For example, some gigabit switches for servers with poor buffering >> settings or implementations were known to cause problems when the >> downstream 10/100M DTUs were used, google for details if this rings >> a bell for your setup. >> >> HTH, >> //Jim Klimov >> >> >> On 2014-07-01 18:29, Edwin Marqe wrote: >> >>> Hi Alejandro! >>> >>> I've indeed checked the log and it seems pretty normal apart of the >>> speed issue. The device is detected a few seconds after plugging it in, >>> but seems to be completely mounted about 40 seconds later (after which >>> the nautilus navigator with the mounted drive is automatically shown). I >>> think this will be a storage capacity problem, as if I plug in any 1-2 >>> Gb USB drive it gets mounted a few seconds after. I've also tried >>> plugging several >= 8 Gb USB drives and it happens with all of them, so >>> I guess it's "normal", but I'd still like to know whether there's a way >>> to enhace the speed of mounting. >>> >>> I'm using Oracle Linux 6.3 and SRS 5.4 here. >>> >>> Thanks for your help >>> >>> >>> 2014-07-01 13:39 GMT+01:00 Alejandro Soler <aso...@martinaditrento.com >>> <mailto:aso...@martinaditrento.com>>: >>> >>> >>> Hi Edwin >>> >>> Not all devices and filesystems are well supported. Check the systems >>> >> >> >> >> -- >> >> >> +============================================================+ >> | | >> | Климов Евгений, Jim Klimov | >> | технический директор CTO | >> | ЗАО "ЦОС и ВТ" JSC COS&HT | >> | | >> | +7-903-7705859 (cellular) mailto:jimkli...@cos.ru | >> | CC:ad...@cos.ru,jimkli...@gmail.com | >> +============================================================+ >> | () ascii ribbon campaign - against html mail | >> | /\ - against microsoft attachments | >> +============================================================+ >> >> >> >> >> _______________________________________________ >> SunRay-Users mailing list >> SunRay-Users@filibeto.org >> http://www.filibeto.org/mailman/listinfo/sunray-users >> > > > _______________________________________________ > SunRay-Users mailing list > SunRay-Users@filibeto.org > http://www.filibeto.org/mailman/listinfo/sunray-users > > _______________________________________________ > SunRay-Users mailing list > SunRay-Users@filibeto.org > http://www.filibeto.org/mailman/listinfo/sunray-users > >
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