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Re: GlusterFS with replica 3

From vallor <vallor@cultnix.org>
Newsgroups alt.os.linux
Subject Re: GlusterFS with replica 3
Date 2025-07-06 02:09 +0000
Message-ID <mcu47gFvprU1@mid.individual.net> (permalink)
References <104ahej$1bgnt$1@dont-email.me> <104atij$1e1pj$1@dont-email.me>

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On Sat, 5 Jul 2025 20:08:15 +1000, Daniel70
<daniel47@eternal-september.org> wrote in <104atij$1e1pj$1@dont-email.me>:

> On 5/07/2025 4:41 pm, ^Bart wrote:
>> Hello everyone,
>> 
>> I have a cluster with the latest GlusterFS on Debian12 with three nodes 
>> but when I try a simple du -sh of the /var/www the node went in "N" 
>> state and it doesn't come back to Y so I need to manually restart 
>> glusterd daemon.
>> 
>> If I don't run backup, rsync, du, etc. the cluster works well, I used 
>> also vmstat to see ram, cpu and disk; I have 4 vcpu 70% and 8GB of ram 
>> for each node, free ram is roughly of 300MB, used about 1,5GB and 
>> buffer/cache about 5GB.
> 
> Free Ram	300MB approx
> Used Ram	1.5GB
> Buffer/cache	5GB approx
> 
> Total		8GB approx
> Available Ram	8GB approx
> 
> .... so are you all full up??
> 
>> I read on internet AWS starts from 16GB of ram for GlusterFS, other 
>> documents said to use 12GB of ram, do you have experience about it?
>> 
>> ^Bart
> 
> If you clear your Buffer/cache, might things run better??

Hi Daniel,

The way Linux works, free memory gets used as Buffer/cache.
As more memory is allocated, it pulls it from the B/C.  It's
basically part of the "free" memory, but being "borrowed"
by the OS for better performance.

-- 
-v System76 Thelio Mega v1.1 x86_64 NVIDIA RTX 3090Ti 24G
   OS: Linux 6.15.4 D: Mint 22.1 DE: Xfce 4.18 Mem: 258G
   "Ever notice how fast Windows runs? Neither have I."

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Thread

GlusterFS with replica 3 ^Bart <none@none.it> - 2025-07-05 08:41 +0200
  Re: GlusterFS with replica 3 Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-05 07:18 +0000
  Re: GlusterFS with replica 3 Daniel70 <daniel47@eternal-september.org> - 2025-07-05 20:08 +1000
    Re: GlusterFS with replica 3 vallor <vallor@cultnix.org> - 2025-07-06 02:09 +0000
      Re: GlusterFS with replica 3 Paul <nospam@needed.invalid> - 2025-07-06 04:12 -0400
  Re: GlusterFS with replica 3 "J.O. Aho" <user@example.net> - 2025-07-05 17:25 +0200
    Re: GlusterFS with replica 3 ^Bart <none@none.it> - 2025-07-07 22:52 +0200
      Re: GlusterFS with replica 3 "J.O. Aho" <user@example.net> - 2025-07-08 09:10 +0200
        Re: GlusterFS with replica 3 ^Bart <none@none.it> - 2025-10-26 21:25 +0100
          Re: GlusterFS with replica 3 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-10-26 20:56 +0000
            Re: GlusterFS with replica 3 Joerg Walther <joerg.walther@magenta.de> - 2025-10-27 17:40 +0100
              Re: GlusterFS with replica 3 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-10-27 21:15 +0000
                Re: GlusterFS with replica 3 "J.O. Aho" <user@example.net> - 2025-10-28 09:10 +0100
                Re: GlusterFS with replica 3 Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-10-28 23:09 +0000

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