# Get the compiled crushmap root@server01:~# ceph osd getcrushmap -o /tmp/myfirstcrushmap
# Decompile the compiled crushmap above root@server01:~# crushtool -d /tmp/myfirstcrushmap -o /tmp/myfirstcrushmap.txt then give us your /tmp/myfirstcrushmap.txt file.. :) 2015-01-14 17:36 GMT+01:00 Roland Giesler <rol...@giesler.za.net>: > On 14 January 2015 at 12:08, JM <jmaxi...@gmail.com> wrote: > >> Hi Roland, >> >> You should tune your Ceph Crushmap with a custom rule in order to do that >> (write first on s3 and then to others). This custom rule will be applied >> then to your proxmox pool. >> (what you want to do is only interesting if you run VM from host s3) >> >> Can you give us your crushmap ? >> > > Please note that I made a mistake in my email. The machine that I want to > run on write first, is S1 not S3 > > For the life of me I cannot find how to extract the crush map. I found: > > ceph osd getcrushmap -o crushfilename > > Where can I find the crush file? I've never needed this. > This is my first installation, so please bear with my while I learn! > > Lionel: I read what you're saying. However, the strange thing is that > last year I had this Windows 2008 VM running on the same cluster without > changes and coming back from leave in the new year, it has crawled to a > painfully slow state. And I don't quite know where to start to trace > this. The windows machine is not the problem, since even before windows > starts up the boot process of the VM is very slow. > > thanks > > Roland > > > > >> >> >> >> 2015-01-13 22:03 GMT+01:00 Roland Giesler <rol...@giesler.za.net>: >> >>> I have a 4 node ceph cluster, but the disks are not equally distributed >>> across all machines (they are substantially different from each other) >>> >>> One machine has 12 x 1TB SAS drives (h1), another has 8 x 300GB SAS (s3) >>> and two machines have only two 1 TB drives each (s2 & s1). >>> >>> Now machine s3 has by far the most CPU's and RAM, so I'm running my VM's >>> mostly from there, but I want to make sure that the writes that happen to >>> the ceph cluster get written to the "local" osd's on s3 first and then the >>> additional writes/copies get done to the network. >>> >>> Is this possible with ceph. The VM's are KVM in Proxmox in case it's >>> relevant. >>> >>> regards >>> >>> >>> *Roland * >>> >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >>> >> >
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