Op 26-05-11 13:38, Edward Ned Harvey schreef: > Perhaps a property could be > set, which would store the DDT exclusively on that device.
Oh yes please, let me put my DDT on an SSD. But what if you loose it (the vdev), would there be a way to reconstruct the DDT (which you need to be able to delete old, deduplicated files)? Let me guess - this requires tracing down all blocks and depends on an infamous feature called BPR? ;) > Both the necessity to read & write the primary storage pool... That's > very hurtful. And even with infinite ram, it's going to be > unavoidable for things like destroying snapshots, or anything at all > you ever want to do after a reboot. Indeed. But then again, zfs also doesn't (yet?) keep its l2arc cache between reboots. Once it does, you could flush out the entire arc to l2arc before reboot. -- No part of this copyright message may be reproduced, read or seen, dead or alive or by any means, including but not limited to telepathy without the benevolence of the author. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
