Hi,

Am Freitag, 20. Oktober 2017 12:23:27 UTC+2 schrieb [email protected]:
>
> If I set --metadata-upload-interval=0 so s3ql won't dump any data.
> I want my maildir working very second.
>
> and if set --metadata-upload-interval=0 what it will cost.
>
 
completely disabling metadata (database) uploading is quite dangerous. You 
will not be able to recover from crashes when you loose the only fresh copy 
of the metadata on the host mounting the S3QL filesystem.

What you could do is to trigger the metadata upload at your convenience 
(e.g. via cron at off-hours). The s3qlctrl program can do 
that: http://www.rath.org/s3ql-docs/special.html#runtime-configuration
s3qlctrl upload-meta /your/mount/point
With this you can decide if and when the metadata uploads happen.

If you cannot tolerate these filesystem "freezes" now and again then S3QL 
might not be the right fit for your use case.

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