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  • 26 votes cast
Jan
23
comment Can I safely use a 1U server with an actively cooled Nvidia GTX 680 video card?
Well there's an active ("K20C") and a passive version of the K20 video card. The passive one is designed for server units like in those specs, so I guess this is also what you've used?
Jan
23
comment Can I safely use a 1U server with an actively cooled Nvidia GTX 680 video card?
We did some comparisons with a K20c and the difference in performance (with our application) was only about 10-20%, while the K20c is about 4-5x the price of a GTX680.
Jan
23
comment Can I safely use a 1U server with an actively cooled Nvidia GTX 680 video card?
It's for CUDA based scientific computing, so I expect the video cards to get pretty hot most of the time. I will look for a 2U server that fits our needs. Thanks for your answer!
Jan
23
comment Can I safely use a 1U server with an actively cooled Nvidia GTX 680 video card?
What kind of chassis are you using - 2U? Or more?
Jan
23
comment Can I safely use a 1U server with an actively cooled Nvidia GTX 680 video card?
1U or 2U doesn't matter that much to me. I'm more curious if I can use cheap GTX video cards that are actively cooled while the fan is pretty close to the chassis top. Does it work well for you, or have you used passively cooled GPUs?
Jan
11
comment Howto set up SGE for CUDA devices?
I still have one more question on this configuration: now I have multiple queues, one of which offers "gpu=2" and the others offer "gpu=0". My problem is, that since "0" is the default value and "0<=2", all users who don't request any GPUs are blocking the GPU-capable queue most of the time with their jobs. How can I tell SGE that this queue is to be used for jobs requesting "gpu>0" only?
Nov
22
comment How to find maximal value for “zfs set quota” without changing quota?
Thanks, that was what I was looking for!
Nov
22
comment How to find maximal value for “zfs set quota” without changing quota?
Thanks! In my case, there is no parent FS, the file system I'm using is the top most one. "zfs get available" thus only returns the remaining free space (1TB actually; the storage should be ~40T). How do I find out the available storage space then?
Sep
6
comment How to check CPU temperature on a HP P2000?
Thanks! I'm aware of the complexity of the overall storage system, I just need to check how close the sensor values are to the danger thresholds. Here I found the thresholds (Table 10 on page 63), now I need to know the real temperature.
Sep
6
comment How to check CPU temperature on a HP P2000?
Thank you! I'm wondering why I don't have those CPU/FPGA lines in the beginning. Is it perhaps due to a different controller version? Mine is TS230P007. Or do I really lack those sensors in my system? You're right, I have a cooling problem, that's why I'm concerned about the particular sensor values. The "Onboard" danger threshold is at 70 C, which is OK, but I can't figure out the temperature of the CPU.
Jun
11
comment OpenLDAP replication fails, “syncrepl_entry: rid=666 be_modify failed (20)”
yeah, it's the same on my ubuntu box.
Jun
11
comment OpenLDAP replication fails, “syncrepl_entry: rid=666 be_modify failed (20)”
what directories exactly do you mean?
May
30
comment Understanding core dump (Solaris 11 crash)
Thank you for this pointer! I will give it a shot and report the results after a while.
May
23
comment Solaris 11: understanding high values in the kernel statistics
I've updated the stats. See also this thread on my attempt on analyzing the core dump: serverfault.com/questions/391912/…
May
23
comment Understanding core dump (Solaris 11 crash)
Thank you, this is a good start indeed. Unfortunately, I can't see anything in the assembler lines either :(
May
20
comment Solaris 11: understanding high values in the kernel statistics
I will have to wait for the next crash to collect this data, but I'll post it as soon as it happens next time. Whenever the system freezes, a reboot is needed, so it doesn't go away on its own.
May
19
comment Solaris 11: understanding high values in the kernel statistics
just the default output of top. I've put the outputs for vmstat and prstat into the post. However, right now the system seems to be ok.
May
14
comment Solaris 11 hangs randomly: need help to figure out the reason
In P2000, there is a cascade of 3 LFF blocks with 10 disks each. Is it a precise answer?
May
14
comment Solaris 11 hangs randomly: need help to figure out the reason
As for your other comments: (A) I already tried to hotswap a disk and it worked pretty well, ZFS marked a disk as degraded and added a hot-spare. I was able to detach the disk, replace it and register as a new hot-spare, so I don't think this should be a problem in our setup. (B) well, I hope the support of Solaris 11 is a matter of time. Anyway, switching to something else will be necessary, if I don't get behind these crashes. (C) There are no core dumps as there is no kernel panic :(. The network interface used is qlcnic (firmware v. 4.8.20)
May
14
comment Solaris 11 hangs randomly: need help to figure out the reason
Thank you for your detailed answer! (1) it's a new installation, the crashes occur from the very beginning (2) connection to P2000 via SAS (what do you mean by layout?) (3) HBA: HP SC08e (4) no Management Agents installed (5) firmware is up-to-date, ILO configured (but nothing in the logs) (6) RAM ok (tested with memtest from some live-CD) (7) ASR is enabled but it's been never triggered