Perl 6 - the future is here, just unevenly distributed

IRC log for #gluster-dev, 2017-04-25

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07:18 PotatoGim Hi, There are some documents to study the disperse volume internal?
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07:19 PotatoGim I tried to find that in glusterfs-specs, glusterfs/docs but not find... :)
07:20 PotatoGim not -> could not
07:21 jiffin apandey, xavih: ^^
07:23 apandey PotatoGim: What do you mean by internals: low level design?I don't think we have any doc which talk about low level design and each functions. However, There are links and doc which talk about disperse volume need, usage.
07:24 apandey PotatoGim: There is also a doc which explains the algo used by current disperse code
07:25 PotatoGim Yes, it is! Could you let me know where it is? :)
07:27 apandey PotatoGim: Just a min
07:29 apandey PotatoGim: You can find the algo doc in glusterfs/doc/developer-guide/ec-implementation.md
07:29 apandey PotatoGim
07:29 apandey PotatoGim: link of the patch sent by Xavi https://review.gluster.org/#/c/15637/5/doc/developer-guide/ec-implementation.md
07:34 PotatoGim apandey: Oh, I guess I did not have enough effort... Thanks a lot! :)
07:34 apandey PotatoGim: These are the PPT's given by xavih way back in 2012 https://www.slideshare.net/GlusterCommunity/disperse-xlator-ramondatalab
07:35 apandey PotatoGim: xavih has replied to a query in which he has covered a high level control flow in EC code  http://lists.gluster.org/pipermail/gluster-devel/2014-June/041000.html
07:36 apandey PotatoGim: I hope these docs would be helpful to understand EC code broadly.
07:39 PotatoGim apandey++: Wow, It is impressed! Thank you so much for your help! :)
07:39 glusterbot PotatoGim: apandey's karma is now 1
07:40 apandey PotatoGim: welcome!!
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09:23 ingard__ hi guys. does anyone here know if there is some known issues regarding disperse volumes and high (8-10ms) network latency?
09:24 ingard__ obviously latency is an issue, but at least if there is work being done or scheduled to improve throughput?
09:30 pranithk1 ingard__: We did that already
09:31 pranithk1 ingard__: We had to enable client-io-threads and increase number of client and server event-threads until the hardware saturated
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09:34 ingard__ pranithk1: ah ok. I'll have a look at that. But does that increase throughput per stream or just enable better concurrency?
09:35 ingard__ pranithk1: also, do you have some documentation for what settings were changed to which levels ?
09:36 pranithk1 ingard__: Let me try to find the bug
09:37 pranithk1 ingard__: https://bugzilla.redhat.com/show_bug.cgi?id=1349953
09:37 glusterbot Bug 1349953: unspecified, unspecified, ---, pkarampu, ASSIGNED , thread CPU saturation limiting throughput on write workloads
09:37 ingard__ i guess I dont understand what goes on and how much information needs to be synced back and forth on the disperse volume, but I thought I would get better throughput when increasing the size of the subvolumes if latency per connection was the main culprit
09:37 ingard__ i'm not seeing any processes with high cpu usage on either client or server
09:38 pranithk1 ingard__: https://bugzilla.redhat.com/show_bug.cgi?id=1349953#c17 has the options
09:38 glusterbot Bug 1349953: unspecified, unspecified, ---, pkarampu, ASSIGNED , thread CPU saturation limiting throughput on write workloads
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09:39 pranithk1 ingard__: Unfortunately I am stuck with some work today and tomorrow. I would have debugged with you otherwise.
09:39 pranithk1 apandey: ^^ can you help?
09:39 ingard__ pranithk1: much apreciated. just ping me whenever you have some free time otherwise :)
09:40 pranithk1 ingard__: oh if you are willing to wait. I really hope to complete things by Thursday and may be we can get a chance to debug this
09:40 ingard__ pranithk1: for sure
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11:22 kkeithley There is only one BZ and one or two action items (which are probably not done). I'm cancelling the bug triage meeting today.
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14:02 ppai samikshan++
14:02 glusterbot ppai: samikshan's karma is now 12
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