Re: lltng enabled by default and qemu apparmor|selinux problems

IF I can add my $0.02 - we were unable to use the libradosstriper library in RHEL6 because it uses the same initialisation tags as librados and lttng does not like that. We had no problems with RHEL7 version of ceph because lttng is not enabled. Please do not re-enable lttng in RHEL7 and later

Re: Adding Data-At-Rest compression support to Ceph

Out of curiosity have you considered the Google compression algos: http://google-opensource.blogspot.co.uk/2015/09/introducing-brotli-new-comp ression.html Paul On 24/09/2015 16:34, "ceph-devel-ow...@vger.kernel.org on behalf of Sage Weil"

Re: [ceph-users] jemalloc and transparent hugepage

Hi Jan If I can suggest that you look at: http://engineering.linkedin.com/performance/optimizing-linux-memory-managem ent-low-latency-high-throughput-databases where LinkedIn ended up disabling some of the new kernel features to prevent memory thrashing. Search for Transparent Huge Pages..

RE: [Ceph-maintainers] statically allocated uid/gid for ceph

What about making it configurable in ceph.conf or /etc/sysconfig/ceph? (or via PAM/ldap...) That way individual users could make it a value that they know does not conflict and they will still be able to move OSDs between nodes etc... Paul Hewlett Senior Systems Engineer Velocix, Cambridge

RE: [ceph-users] systemd unit files and multiple daemons

What about running multiple clusters on the same host? There is a separate mail thread about being able to run clusters with different conf files on the same host. Will the new systemd service scripts cope with this? Paul Hewlett Senior Systems Engineer Velocix, Cambridge Alcatel-Lucent t: +44