Author Archive
Openfire. Migrating from HSQLDB to MySQL.
The other day, I had to migtate Openfire from HSQLDB to MySQL using MySQL Migration tool and below just a couple tips that could save a bit of your time if you up to the same task: I used Windowds XP. MySQL Migration tool has been EOLed but it is still available from mysql.com. Java […]
VM cold migration. Invalid configuration for device.
Last weekend I was doing a cold migration of one of our VMs and when the migration was one step before it would be done the following error popped up: Invalid configuration for device 15. Must admit, that wasn’t one of the helpful messages I expected to see. Anyway, quick googling led me to the […]
How to setup Solaris 10 ldap client and glue it with ssh
Recently I wrote a post about configuring OpenLDAP server with TLS support using RHEL available here. There I also mentioned how to setup Linux to authenticate against a LDAP server. But I didn’t said a word about Solaris. That’s unfair and I’m going to fix that by providing a quick guide on how to setup […]
TAO: Facebook’s Distributed Data Store for the Social Graph
This post will be very succinct. Just a single link to a publication of TAO’s details at USENIX and a quote from the abstract part of the paper to catch your eye: We introduce a simple data model and API tailored for serving the social graph, and TAO, an implementation of this model. TAO is […]
Apple WWDC 2013
In no way being another Apple deaf and blind fanboy, though I prefer to use Apple products, I must admit, after watching the keynotes, that it was an astonishing and fantastic show. And I truly concur with the audience when it stood up to welcome new iOS7 and to share their emotions. Hats off to […]
When I met Anthony Kiedis
Back in 1999 met Anthony Kiedis on one the most famous Moscow street – Old Arbat Street. And the result of this short meet up you could see below:
Simple Python scp wrapper
Inspired by the following article I decided to write a simply python scp wrapper which is based on the ideas taken from the perl script also mentioned on the same page. The whole point of this wrapper is dead simple: to allow certain users scp into their specific directories with out granting full ssh access. […]
OpenLDAP do_syncrep retrying attempts
Do you observe the error messages on your Linux OpenLDAP replica or master server similar to the ones listed below: May 16 12:05:21 ldapserver1 slapd[5420]: do_syncrep2: rid=005 (-1) Can’t contact LDAP server May 16 12:05:21 ldapserver1 slapd[5420]: do_syncrepl: rid=005 rc -1 retrying (4 retries left) May 16 12:05:21 ldapserver1 slapd[5420]: do_syncrep2: rid=002 (-1) Can’t contact […]
How the SCP protocol works
That’s not my title but the one I stole from a fantastic Jan Pechanec’s blog post that describes how the SCP protocol works – https://blogs.oracle.com/janp/entry/how_the_scp_protocol_works I really encourage everyone to read it.
In: FreeBSD, HP-UX, Linux, Solaris
How to create new thin devices using symcli and add them to a masking view and a storage group
Below are the steps that I used recently to create and present a few thin devices. More precisely: Boot disk – 50GB Two TDEVs 150GB each. One for data and the other for logs. Create a nested initiator group: symaccess -sid VMAX-SID create -name IG_SERVERNAME_HBA0 -type initiator -consistent_lun symaccess -sid VMAX-SID -name IG_SERVERNAME_HBA0 -type initiator […]