this post was submitted on 17 Nov 2023
2 points (100.0% liked)

Self-Hosted Main

502 readers
1 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

For Example

We welcome posts that include suggestions for good self-hosted alternatives to popular online services, how they are better, or how they give back control of your data. Also include hints and tips for less technical readers.

Useful Lists

founded 1 year ago
MODERATORS
[email protected]
2
Listing a directory (and entering) on ZFS takes a few seconds the first time? (re: sleep/idle?) (alien.top)
submitted 10 months ago by [email protected] to c/[email protected]
1 comments fedilink hide all child comments
 

I have a few ZFS ZPOOLs configured:

NAME      SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
backup   1.81T  1.41M  1.81T        -         -     0%     0%  1.00x    ONLINE  -
storage  21.8T  7.47T  14.3T        -         -     0%    34%  1.00x    ONLINE  -
tank     87.3T  19.2T  68.1T        -         -     0%    22%  1.00x    ONLINE  -

...but when I enter a directory ("cd /tank") it takes about two seconds or longer. When I perform a directory listing it's the same result. However, after it "warms up" then everything is instant.

What might be causing this?

I'm using a Norco RPC-4220 enclosure with LSI/Avago 9211-8i cards in IT mode. The drives are WD Ultrastar DC 550s (on one array) and WD Reds (different array) and are connected to the backplane using SATA and then cards are connected using SAS (I think?).

I don't think the drives themselves are spinning down because they don't seem to support it?

hdparm -B /dev/disk/by-id/ata-WDC_WD40EFZX-68AWUN0_WD-WX12DB0LN94R

/dev/disk/by-id/ata-WDC_WD40EFZX-68AWUN0_WD-WX12DB0LN94R:

APM_level = not supported

The only thing I can think of is that my server's RAM is 70% full which might be causing some problems?

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 1 points 10 months ago

Out of curiosity, do you have everything in /tank? As in tens of thousands of directories or files directly in the root versus a tree of directories?