Dedup table limit reached

[Fabien Rouach]

Hi,

I've created a first pool (Dedup Disk and compression enabled) and added a disk

Created a second pool (same settings), when trying to add a disk, got this error message :

ERROR: Reply from server is "Pool Internal_5TB needs to maintain its own dedupe tables, but dedupe tables limit reached current tables 1 max 1"

What I'm trying to do:

Having 2 pool, totally independent from each other, so i can loose one, without loosing data of the second.

And be able to move a disk pool to another system.

I'm a bit lost about how dedup tables are managed and what should be the good configuration to get that

When transferring a pool to another system do I need to have it's dedup tables too?

If not, i could add another disk i have to default pool (no disk in there actually) and let dedup tables in default pool, would it be the right way to do it?

Thanks

[QUADStor Support]

The limit on the number of deduplication tables has changed (reduced)
to 1 since the last release. The documentation is fixed now to reflect
this change. Please see "Enabling dedupe metadata for a pool" in
https://www.quadstor.com/storage-pools.html

To explain the behavior, we now try to create the all deduplication
tables during disk initialization itself. Keeps the table sequential
on disk and very little random IO in the process. However since we
create the tables beforehand we can only assign the metadata to one
pool. So the preferred way to create will be to assign storage to the
"Default" pool first and then all other pools with store the
deduplication entries in the default pool.


To revert back to the old behavior

Edit /quadstor/etc/quadstor.conf and add the following line
SequentialTables=0
service quadstor restart

But you will have to remove the configured disks and then try adding them again.

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[Fabien Rouach]

I've done the changes (rebuilt a system from scratch)

noe got that error when adding disk to the second pool:

ERROR: Reply from server is "Pool D6000_Test needs to maintain its own dedupe tables, but dedupe tables limit reached, ddlookup count 8388608 max roots 2097152 max 9207291"

Note that my first pool include 1 disk of 54.5 TB

[QUADStor Support]

Please send the diagnostics logs to sup...@quadstor.com.

The error indicates that the change to quadstor.conf is not being picked up