I forgot to say that Bacula client on my Zimbra server (which is
currently being backed up) is using most of the CPU. According to top
command, bacula-fd is reporting between 10%, 30% or even 80% of CPU
usage. Meanwhile, swap usage is currently low (~ 3%)
On Fri, Apr 22, 2016 at 9:57 AM, Jason Voorhees <jvoorhees1 AT gmail DOT com>
wrote:
> Hello guys:
>
> I'd like you to share some thoughs about my scenario and performance.
> Here's what I have:
>
> Server (Director & Storage)
> ====================
> System: KVM guest running on Proxmox 4.1 host
> Network: virtio
> Storage: 5x200 GB Virtual disks (qcow2 format), used as physical volumes
> Filesystem: ext4 'by default' on LVM
> Memory: 4 GB
> CPU: 1 core on guest, 8 cores on host (Intel Core i7 3.4 GHz)
> Bacula: 7.4.0 built from source
> OS: CentOS 7 x86_64
> Roles: Bacula with MySQL (used only for backups, nothing else)
>
>
>
> - iperf tests between my bacula server and one of my clients (which is
> also a KVM guest sharing the same physical host with virtio network)
> gave me near 9.78 Gbps rate which seems awesome.
> - I'm using disk backups without Attribute Spooling enabled, yet.
> - GZIP compression and SHA1 signatures are also enabled for all my jobs.
> - MySQL hasn't been tuned at all, it came by default.
>
>
> Yesterday, I ran a Full backup for a Samba fileserver with 280 GB of
> data. Such backup took about 6 hours, having near 15% compression rate
> and near 240 GB written by SD and FD daemons. This Samba server have
> Bacula Client 2.4.4.
>
> Today I'm running a Full backup for a Zimbra server with near 450 GB
> of data to be backed up. I'm running iptraf-ng right now and I can see
> variable rate transfer through my network interface from 10 Mbps up to
> 80 Mbps with an average of 50 Mbps.
>
> I'd like to hear some thoughts from you because I have some questions:
>
> - Is it normal to have a rate of 50 Mbps rate while running a backup?
> - How can I know if MySQL is a bottleneck?
> - Should I disable compression and signatures to improve speed of
> backups? Is it worth it?
> - What if I enable attribute spooling? I've read posts in which some
> people noticed an improvement on data transfer but the despooling
> process of attributes it took too long.
> - Is my backup speed good enough? Should I worry about it? Can they be
> even faster?
>
> Thanks in advance for reading and helping :)
>
> Have a nice day
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