Hi Bjørn, actually they improved the isi change list a lot with OneFS8 and performance is no longer really that much of an issue - at least not with 8 to 9-figure number of objects in the file system. My problem (and the main reason why we haven’t integrated it yet into MAGS) is that it is a 99.9% kind of a function. Just like NetApp Snapdiff, you’d always have to recommend doing periodic full incrementals to catch whatever was missed when calculating the snapshot difference (and there usually is). Just like with Snapdiff, you’ll have the back and forth when it comes to who’s problem it is if it doesn’t work and what combination of client and OS on the filer is supported. At the end of the day you’ll have to be able to run a full incremental within an acceptable period of time - and if you have to be able to do that anyway, why not make backup fast enough to run the real thing every day? And using a journal or snapshot difference for backup doesn’t benefit restores one bit, of course.
Regards Lars Henningsen General Storage > On 20. Jul 2018, at 15:48, Bjørn Nachtwey <bjoern.nacht...@gwdg.de> wrote: > > Hi all, > > yes there's a special daemon that might be used -- in theory :-) > in pratice it worked only for small filesystem sizes ... and if it's filled > partially. > > A guy from the concat company did some tests and told me they were totally > disappointing as this deamon consumes too many ressources if you let it write > a protocol file which you can use to identify changed, added and deleted > files. > But as far as i know it didn't give a list of changed files just logs all > changes on the files with the kind of the change. > > @Lars (Henningsen): Do you know some more details? > > best > Bjørn > > Skylar Thompson wrote: >> Sadly, no. I made a feature request for this years ago (back when Isilon >> was Isilon) but it didn't go anywhere. At this point, our days of running >> Isilon storage are numbered, and we'll be investing in DDN/GPFS for the >> forseeable future, so I haven't really had leverage to push Dell/EMC/Isilon >> on the matter. >> On Thu, Jul 19, 2018 at 11:31:06PM +0000, Harris, Steven wrote: >>> Is there no journaling/logging service on these Isilions that could be used >>> to maintain a list of changed files and hand-roll a >>> dsmc-selective-with-file-list process similar to what GPFS uses? >>> >>> Cheers >>> >>> Steve > > >> [...]
