About the disk rate limit I meant.... because the user is awaiting and
as it's a big amount of data... a user wouldn't mind to wait... so...
there perhaps we could.... slow down a little for prioritizing other
users faster tasks....
-------- Mensaje Original --------
ASUNTO:
Suggestions for Cyrus
FECHA:
2022-05-06 12:21
DE:
[email protected]
DESTINATARIO:
Info <[email protected]>
Good morning,
We are suffering some performance issues with some new ssd disks we are
testing. We suffer in performance, due to write amplification and trims.
Having seen that, I have been thinking perhaps a couple of things would
be very useful in Cyrus. We use delete mode delayed and that's nice for
messages, but does not help when you remove for instance one big folder
with 50.000 messages each. I say it because for that purpose Cyrus
creates the entire hierarhy under DELETED again. When say it creates I
mean it copies first whole deleted folders, then deletes them from
original place. One extremely nice thing that Cyrus has, is the
possibility of removing content at cyr_expire running time... nightly...
it's a big pity not to be able to do this same with a whole deleted
folder.
I think that perhaps a new folder/mailbox state could be created for
avoid listing that folder in a LIST or LSUB.... Later cyr_expire to
check the existence of folders in that state (folder removed) and then
to be removed (but at night... when cyr_expire runs...).
Another idea, I think it would be very useful is, when a non admin user
is copying a very big amount of data, to be possible to rate limit the
total amount of disk io at which that copy could be done. I think that
could be extremely useful too.
If is nothing similar created (of both things) do you think too could be
useful?. I could try to propose to my bosses working on it and later to
share this work with Cyrus community :) . What do you think about it?.
Cheers,
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Cyrus: Info
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