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arc

  1. N

    ZFS Arc Throughput benchmarking

    Hi, I'm trying to make some benchmark tests. I start by some synthetic ones locally on the pool Plateform summary Motherboard SuperMicro X10DRH-CT 2x Xeon E5 V3 @ 2.9Ghz (total of 32 threads) 64 Gb RAM (DDR4 ECC 2133) Chelsio T580-CR network card (40Gb/s) FreeNAS-11.2-U5 Tested pool summary...
  2. D

    Making vfs.zfs.arc_max setting persist

    Hi there- I've got a new setup with 128GB ram, and I'd like to cap out vfs.zfs.arc_max at around 32GB (I have an 8x10TB RAIDZ2 with ~50TB of usable space). It seems that vfs.zfs.arc_max is set to max RAM - 1GB, and with my rsyncing of data over to this new machine ARC is taking up all the...
  3. S

    Explanation of ARC hit graphs?

    My understanding is reads can be served from either: RAM - ARC hit SSD - L2ARC hit General disks I would NOT expect a read to be serviced by BOTH ARC and L2ARC, yet my graphs are showing ARC and L2ARC hit ratios, that when combined, far exceed 100%. How is this possible? I thought one could...
  4. cobrakiller58

    Windows explorer cause slow transfer

    TLDR: has anyone ever seen windows explorer slow a transfer because it was trying to update the directory listing (or something similar) after every file transferred? Today I was moving 21000+ small files for a total of 14gig, half way through the transfer it slowed to below 1MB/s after...
  5. T

    Plex & ARC Integration

    Many of us run ZFS for myriad purposes. For those who use it in DCs or “work” purposes, I salute you, but this thread is for media enthusiasts who love ZFS for many of the same reasons, but have very different workloads. I imagine an ARC that is told to load files in anticipation as I and my...
  6. gusgus

    SOLVED L2ARC size is >1TB? Also poor performance.

    About a year ago I noticed a drop in my SMB share performance. If I recall accurately, at the time I didn't think much about it as I had just updated FreeNAS to the latest release (I think it was a minor release update, like 9.10-Ux to 9.10-Uy, but I'm not sure). I had assumed that the L2ARC...
  7. E

    zfs send/receive and ARC/L2ARC

    I'm building a system with two backup servers (A and B). I'll have 10+ hosts pushing datasets to backup A via zfs send. Backup A will then push all of those datasets to backup B using zfs send. My question is - will backup A write everything that it receives via zfs receive into the...
  8. R

    Pool lost performance

    Hi All, I have a system running that is exporting the pool/datasets using NFS to some ESXi server, sinds about 3 weeks my pool has lost all possible perfomance, an i would like to know why, i have been looking at all the numbers of my system but am unable to point to the real reason in this...
  9. geek_person

    Novato con muchas dudas

    Buenas a todos, chicas y chicos hispano parlantes, soy medio novato en esto de FreeNAS, así que ¡Hola a tod@s! Espero estar activo por el foro, aunque lo he empleado en multitud de ocasiones, para hace un simple disco en red, es ahora cuando me he agenciado con un Proliant y 4 discos para hacer...
  10. A

    Configuring L2ARC to only cache certain directories

    In configuring my hypothetical server, I have a few questions about the ARC/L2ARC. Our use-case is a little odd. We have a directory full of many small files, new batches of which are generated at the beginning of every month. When doing data analysis, we want to be able to access this month's...
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