Day: August 14, 2009

EMC^2/Legato Net­work­er 7.5.1.4 status

The update to 7.5.1.4 went fine. No major prob­lems encoun­tered. So far we did not see any regres­sions. The com­plete sys­tem feels a lit­tle bit more sta­ble (no restarts nec­es­sary so far, before some where nec­es­sary from time to time). We still have to test all our prob­lem cases:

  • restart NW-server direct­ly after delet­ing a client with index entries (man­u­al copy of /nsr need­ed before, in case the medi­adb cor­rup­tion bug is not fixed as promised)
  • shut­down a stor­age node to test if the NW-server still crash­es in this case
  • start with an emp­ty medi­adb but pop­u­lat­ed clients (emp­ty /nsr/mm, but untouched /nsr/res) and scan some tapes to check if “shad­ow clients” (my term for clients which have the same client ID but get new­ly cre­at­ed dur­ing the scan­ning with a new client ID and a name of “~<original-name>-<number>”) still get cre­at­ed instead of pop­u­lat­ing the index of the cor­rect client

The first two ones are sup­posed to be fixed, the last one is maybe not fixed.

Not fixed (accord­ing to the sup­port) is the prob­lem of need­ing a restart of the NW-server when mov­ing a tape library from one stor­age node to anoth­er stor­age node. It also seems that our prob­lem with the man­u­al cloning of save sets is not solved. There are still some clone process­es which do not get out of the “serv­er busy” loop, no mat­ter how idle the NW-server is. In this case it can be seen that nsr­clone is wait­ing in nanosleep (use pstack or dtrace to see it). The strange thing is, that a safe set which is “fail­ing” with such behav­ior will always cause this behav­ior. We need to have a deep­er look to see if we find sim­i­lar­i­ties between such safe sets and dif­fer­ences to safe sets which can be cloned with­out problems.

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Dai­ly doxy­gen gen­er­at­ed docs of the FreeB­SD ker­nel (head)

I man­aged to get some time to set­up an auto­mat­ed gen­er­a­tion of the doxy­gen docs for ker­nel sub­sys­tems of FreeB­SD on my webserver.

Every night/morning (Ger­man time­zone) the sources will be updat­ed, and the docs get regen­er­at­ed (this takes some time). Cur­rent­ly this depends upon some patch­es to the make­file and doxy­gen con­fig files in tools/kerneldoc/subsys. Every­thing is gen­er­at­ed direct­ly in the place where the web­serv­er will look for to deliv­er the pages, so if you browse this in the mid­dle of the gen­er­a­tion, the con­tent may not be con­sis­tent (yet).

Please be nice to the web­serv­er and do not mir­ror this. You can gen­er­ate this your­self very easy. Assum­ing you have the FreeB­SD source on a local hard disk, you just need to down­load the patch from http://www.Leidinger.net/FreeBSD/current-patches/ (if you do not find dox.diff, update your FreeB­SD sources and every­thing will be OK), apply the patch, cd into tools/kerneldoc/subsys and run “make all” (or “make vm” or what­ev­er you are inter­est­ed in). You need doxy­gen installed, off course.

If you want to set­up some­thing like this your­self, just down­load the script which is doing all the work, change some vari­ables in the begin­ning, and cre­ate your own local ver­sion of the com­plete docs.

In case this is using sig­nif­i­cant traf­fic, I will ask core/admins if there is the pos­si­bil­i­ty to host it on FreeBSD.org resources.

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