berend is currently certified at Journeyer level.

Name: Berend de Boer
Member since: 2001-01-02 07:50:46
Last Login: 2015-01-26 19:04:29

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Homepage: http://www.berenddeboer.net/

Notes:

I'm a software engineer, currently working for Xplain Hosting, A drupal hosting specialist, as Senior Drupal specialist. I was probably the first person to use Drupal in New Zealand!

I'm also very interested in web applications, for which I mainly use Eiffel. The most interesting class of web applications are business process systems, in which I specialise.

I'm also busy with Eiffel free software projects. I maintain the Cetus Links Eiffel pages.

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Continually see this in svn 1.8.11 server log currently:

Provider encountered an error while streaming a REPORT response.  [500, #0]
A failure occurred while driving the update report editor [500, #103]

Get this when doing a checkout/update. Client says:

svn: E120190: Error retrieving REPORT: An error occurred during authentication

Many reports of same problem over many years over the internet. No solution.

The only thing that works is svn 1.6 client. Go figure.

Setup is apache 2.2 server, wandisco latest 1.8 svn, and svn repository is nfs mounted. But that doesn't matter, even when making the repository local it doesn't work.

Upgraded my Ubuntu 14.04 Trusty Tahr to the WanDisco 1.8.11 from 1.8.8, doesn't help.

Another update on the Linux NFS server problems I had: massively high i/o by process jbd2/xvda1-8.

Problems came back. So switched from paravirtualisation to hvm. And initially that appeared to work.

But now, any time we launch another php5-fpm server, immediately jbd2/xvda1-8 jumps to it's max. Tearing my hear out.

5 Jul 2014 (updated 20 Aug 2014 at 23:53 UTC) »

An update on the Linux NFS server problems I had: massively high i/o by process jbd2/xvda1-8.

The initial fix I settled on was perhaps a file system corruption issue. That didn't work actually, even though initially it looked like it did.

Then I thought it maybe a Linux kernel. But even that didn't permanently fix it.

Issue just appeared again: added one more php5-fpm server to the mix, an identical copy of another one, and bang problem came back.

My latest solution: I was using an lvm2 stripe, switched to an md stripe. Seems to work so far.

Update: didn't work, see http://www.advogato.org/person/berend/diary/401.html

26 Jun 2014 (updated 26 Jun 2014 at 23:33 UTC) »

Suffered from very slow scp to a FreeBSD server. rootbsd said the hpn patch should help, but that it was already applied in FreeBSD 10. That was the pointer I needed.

By default FreeBSD has some kind of scp transfer performance improvement patch:


# Disable HPN tuning improvements.
#HPNDisabled no


When I change this to:

HPNDisabled yes

My scp performance jumped from about 300KB/s to 8MB/s in this particular instance. Now applying this to all my FreeBSD boxes, on my local network performance jumped from 58MB/s to 71MB/s.

I think this setting should be disabled!

As an update to my last post on weird Ubuntu 12.04 NFS4 server load: repairing the ext file system actually didn't really work.

Redid the test, problems came right back.

Next thing I did was turn the root volume into xfs: better, but still writing 1MB/s, with 50% i/o utilisation for the root disk.

So perhaps a Linux kernel things. Created a 13.10 nfs server, problem disappeared.

398 older entries...

 

berend certified others as follows:

  • berend certified RogerBrowne as Journeyer
  • berend certified richieb as Master
  • berend certified pschoenb as Apprentice
  • berend certified stimuli as Journeyer
  • berend certified gmc333 as Apprentice
  • berend certified doylep as Journeyer
  • berend certified stone as Apprentice
  • berend certified angelsun as Journeyer
  • berend certified uweo as Journeyer
  • berend certified mattbradshaw as Apprentice
  • berend certified dlr as Master
  • berend certified josh as Master
  • berend certified raph as Master
  • berend certified ZIG as Master
  • berend certified hacker as Master
  • berend certified gregor as Journeyer
  • berend certified elj as Journeyer
  • berend certified rkroll as Journeyer
  • berend certified ksb as Journeyer
  • berend certified noda as Apprentice
  • berend certified lloydwood as Journeyer
  • berend certified karlberry as Master

Others have certified berend as follows:

  • RogerBrowne certified berend as Journeyer
  • gmc333 certified berend as Master
  • welisc certified berend as Journeyer
  • elj certified berend as Journeyer
  • doylep certified berend as Apprentice
  • stone certified berend as Journeyer
  • mobius certified berend as Journeyer
  • angelsun certified berend as Journeyer
  • uweo certified berend as Apprentice
  • lerdsuwa certified berend as Journeyer
  • etoffi certified berend as Master
  • josh certified berend as Journeyer
  • MikeGTN certified berend as Apprentice
  • jono certified berend as Journeyer
  • fxn certified berend as Journeyer
  • nixnut certified berend as Journeyer
  • sdodji certified berend as Journeyer
  • mpr certified berend as Journeyer
  • ebf certified berend as Journeyer
  • domi certified berend as Journeyer
  • watete certified berend as Journeyer
  • mdupont certified berend as Journeyer
  • bjf certified berend as Journeyer
  • mentifex certified berend as Apprentice
  • wspace certified berend as Journeyer
  • e8johan certified berend as Journeyer
  • nikole certified berend as Master
  • arahwilde06 certified berend as Journeyer
  • chalst certified berend as Journeyer

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