Linux nvme tuning


  • This page is about optimal set up of an SSD (Solid State Drive). This page should be kept clean enough for beginners to get the most basic idea. Set RAMTMP, RAMRUN and RAMLOCK to "yes" (in /etc/default/rcS or /etc/default/tmpfs since Wheezy). Of course, this will not improve writing to the SSD if your system (filesystem holding / or /tmp) is not located on it. Please note files in /tmp are wiped out upon reboot unless /etc/default/rcS is set to something other than TMPTIME=0 (if not set, 0 is the default value). on the ssd mountpoints periodically (but the WARNING at the top of the page is relevant here too). For older versions software raid (md device layer) that lack trim support, you could use something like mdtrim ( ). You don't have permission to access " on this server. Reference #18.b9ef54b8.1558381961.a01b231. (This step is not necessary for SSDs using the NVMe protocol instead of SATA, which bypass the traditional I/O scheduler and use the blk-mq module instead.). Alternatively, and often not recommended: Set "discard" mount option in /etc/fstab for the ext4 filesystem, swap partition, Btrfs, etc. See mount(8). Alternative to setting the "discard" options is to set up an offline-trim cronjob that runs time fstrim -v. The "discard" options with on-disk-cryptography (like dm-crypt) have drawbacks with security/cryptography. Set "issue_discards" option in /etc/lvm/lvm.conf for LVM if you want LVM to discard on lvremove. See lvm.conf(5). Use the ext4 filesytem (the most mature filesystem) unless you have reason not to. Or better, use pm-utils ( Debian BTS #659260 ), tlp, or laptop-mode-tools (also optimizes read buffers) to configure the laptop-mode even under AC operation. The performance of SSDs is also influenced by filesystem mounting options:. Optionally, make system only flush data to the disk every 10 minutes or more:. This improves filesystem read performance for both SSDs and HDDs. /etc/default/tmpfs is a sysvinit specific config file. If you are. The btrfs filesytem is still in experimental state (as of kernel 3.11) but supports additional mount options like "ssd". /var completely if supported (syncing once a day? avoids spin-ups and allows to save /var also to SSD), at least set this up for. Further improvement: Patch anything-sync-daemon or goanysync to use a (copy-on-write) union filesystem mount (e.g. Use of RAMDISK can stop constantly changing files from hitting on the SSD (it may hit SSD via swap). RAMDISK configuration may be performed via. If /home is not on a persistent ramdisk, use profile-sync-daemon to have the browser database and cache copied into RAM during uptime (. Have enough DRAM required to operate without swap space under normal workloads. The default I/O scheduler queues data to minimize seeks on HDDs, which is not necessary for SSDs. Thus, use the "deadline" scheduler that just ensures bulk transactions won't slow down small transactions: Install sysfsutils and.

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