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Nick7

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  1. Did you verify /proc/sys/dev/raid/speed_limit_max ? It limits rebuild speed. Try setting it higher: # echo 200000 > /proc/sys/dev/raid/speed_limit_max You can also try following: # echo 4096 > /sys/block/md0/md/stripe_cache_size
  2. For pure speed, ZFS is not the winner. It has many useful and good features, but being the fastest aint one of it. PS: As far as MTU goes, in my tests it did increase throughput quite a bit.
  3. Set MTU to 9000, this will give you some extra speed.
  4. Err.... server mentioned is NOT a rack server! On HPE's site it claims 'HPE ProLiant MicroServer Gen8 is a small, quiet, and stylishly designed server'.
  5. TBH, I'd get used HP DL360 Gen8, and just load it with RAM... or Dell/IBM/other with 2011 socket and DDR3 (RDIMM) support.
  6. If you need lots of RAM, go with server motherboard which uses Xeon and registered RAM. RDIMM's are quite cheap on e-bay, since you can only use them in servers.
  7. Ah, cool... that actually does work, tested it. I was always working with RAIDZ, so for that it did not work (attaching mirror vdev). export/import also works for using UUID's, but it's important to do it. ashift=12 is for 4k disks. Often it's on by default, but on some occasions it can fail - so it's safer to specify it while creating. Good luck, and be careful not to overwrite wrong disks!
  8. There's several things you are doing wrong. First - you cannot modify disks/vdevs inside zpool. What you need to do in create zfs pool with mirrored devices. To achieve this in zfs you create mirror between disk and sparse file, and fail that file - so later you can replace it with real device. Second, it's always recommended to use partitions. Third, never use /dev/sdX names in zfs pool! Use by partition uuid. From top of my head, you should do something like: 1) Create 2TB and 1Tb sparse files: # dd if=/dev/zero of=/tmp/sparse_file1 bs=1 count=0 seek
  9. You can do that also by using FTP or SFTP. No need to use web interface. But there are also solutions for using web solution, just google a bit for it.
  10. .. and you plan to use 'web interface' for? Which functionality you need?
  11. Check: https://forum.odroid.com/viewtopic.php?f=168&t=40598 Basically, on not latest kernels you need to build it yourself. There are also other guides. No need to buy new motherboard/or another network card
  12. Did you check disk metrics during I/O what it shows?
  13. Windows also does not write immediately to disk, unless required by app (sync write). But, there's one thing about PrimoCache that is quite dangerous - defer writes can write data out of order, and in case if crash - it *will* lead to corruption, possibly silent (worst) - chkdsk passes, but data is corrupt. So, PrimoCache is nice to speed up reads, but quite dangerous for writes. On Linux, bcache is much better solution. More configurable, and can handle crash situations, so no data is lost.
  14. Silly question, but why do you need so much capacity only on SSD's on a gaming PC?
  15. You didn't mention one important thing - what capacity you intend to have?
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