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	<title>vnull&#039;s blog</title>
	<atom:link href="http://jakub.wartak.pl/blog/?feed=rss2" rel="self" type="application/rss+xml" />
	<link>http://jakub.wartak.pl/blog</link>
	<description>by Jakub Wartak</description>
	<lastBuildDate>Thu, 20 May 2010 12:53:07 +0000</lastBuildDate>
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		<title>Testing NetApp&#8217;s SyncMirror whole plex failure (on simulator)</title>
		<link>http://jakub.wartak.pl/blog/?p=190</link>
		<comments>http://jakub.wartak.pl/blog/?p=190#comments</comments>
		<pubDate>Thu, 20 May 2010 12:50:30 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[NetApp]]></category>
		<category><![CDATA[SAN]]></category>

		<guid isPermaLink="false">http://jakub.wartak.pl/blog/?p=190</guid>
		<description><![CDATA[Together with Lukasz Borek we&#8217;ve tested the SyncMirror reliability under some stress&#8230;. In short basic NetApp deployment just uses RAID-DP (Double Parity, so you are might 2 disks fail before you loose data). If your data is critical, they you can actually configure SyncMirror which just mirrors aggregate (on top of which are volumes) to [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=190</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>MAA challenge lab, part #4</title>
		<link>http://jakub.wartak.pl/blog/?p=172</link>
		<comments>http://jakub.wartak.pl/blog/?p=172#comments</comments>
		<pubDate>Fri, 30 Apr 2010 10:07:26 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[XEN]]></category>
		<category><![CDATA[cluster]]></category>

		<guid isPermaLink="false">http://jakub.wartak.pl/blog/?p=172</guid>
		<description><![CDATA[No posts on my blog for long time, need to change that. So i was trying to get MAA (Maximum Availability Architecture by Oracle) lab again in shape for writing Master of Science thesis&#8230;

Somewhere near Janurary/Februrary this year:

Primary VM RAC nodes prac1, prac2, prac3 are working again, but database db3 is not (unable to archive [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=172</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Moving blog to http://jakub.wartak.pl/blog</title>
		<link>http://jakub.wartak.pl/blog/?p=145</link>
		<comments>http://jakub.wartak.pl/blog/?p=145#comments</comments>
		<pubDate>Fri, 11 Sep 2009 16:59:46 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://jakub.wartak.pl/blog/?p=145</guid>
		<description><![CDATA[Please update references, I&#8217;m moving my blog to  http://jakub.wartak.pl/blog .
]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=145</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Storage migration for ASM database deployed on Oracle Enterprise Linux in Oracle VM without downtime.</title>
		<link>http://jakub.wartak.pl/blog/?p=102</link>
		<comments>http://jakub.wartak.pl/blog/?p=102#comments</comments>
		<pubDate>Thu, 21 May 2009 18:12:35 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[Oracle ASM]]></category>
		<category><![CDATA[OracleVM]]></category>
		<category><![CDATA[SAN]]></category>
		<category><![CDATA[XEN]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=102</guid>
		<description><![CDATA[Suppose you wanted to migrate your database from storage array SAN1 to SAN2 without downtime. With Oracle databases using ASM this is possible. It was performed on configuration better described here. One note: the LUN can be visible through dom0 or directly by domU (by passing PCI hardware handling into our domU VM) &#8212; this [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=102</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Graphing Oracle&#8217;s Shared Server configuration (V$QUEUE)</title>
		<link>http://jakub.wartak.pl/blog/?p=111</link>
		<comments>http://jakub.wartak.pl/blog/?p=111#comments</comments>
		<pubDate>Thu, 21 May 2009 18:10:48 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=111</guid>
		<description><![CDATA[Tuning Oracle&#8217;s Shared Server(MTS) is not so straightforward task, but I&#8217;ve developed simple perl script named plotvqueue.pl that can draw over time the following info:
1) absolute COMMON waits &#8211; how many waits there were in the COMMON (VC) queue in interval time (1min)
2) no# of COMMON queued &#8211; number of items in the COMMON queue [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=111</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>SHA1, SHA256, SHA512 in Oracle for free without using DBMS_CRYPTO</title>
		<link>http://jakub.wartak.pl/blog/?p=124</link>
		<comments>http://jakub.wartak.pl/blog/?p=124#comments</comments>
		<pubDate>Thu, 21 May 2009 18:10:10 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=124</guid>
		<description><![CDATA[SHA1, SHA256, SHA512 in Oracle for free without using DBMS_CRYPTO! (yay! without Enterprise Edition!) powered by GNU CRYPTO project 
For detailed list of algorithms please consider this link. (much more than DBMS_CRYPTO in 11g, which requires you to buy Enterprise Edition).

[oracle@xeno src]$ ls -l
total 764
-rw-rw-r-- 1 vnull vnull    458 Mar  1 [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=124</wfw:commentRss>
		<slash:comments>4</slash:comments>
		</item>
		<item>
		<title>Fincore &#8211; how to monitor VM cache (A.K.A. what&#8217;s inside)</title>
		<link>http://jakub.wartak.pl/blog/?p=116</link>
		<comments>http://jakub.wartak.pl/blog/?p=116#comments</comments>
		<pubDate>Thu, 21 May 2009 18:09:40 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Linux]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=116</guid>
		<description><![CDATA[Back in November 2008, I&#8217;ve asked question how to monitor VM cache performance (cache hit ratio) under Linux on Kevin Closson&#8217;s blog. Now I&#8217;ve just found utility that allows to show pretty nicely what *is* in VM cache. The utility is called &#8220;fincore&#8221;, it is written in Python and has some strange Python/perl dependecies, but [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=116</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>MAA challenge lab, part #3</title>
		<link>http://jakub.wartak.pl/blog/?p=110</link>
		<comments>http://jakub.wartak.pl/blog/?p=110#comments</comments>
		<pubDate>Wed, 15 Apr 2009 06:48:43 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Laboratory]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Grid Control]]></category>
		<category><![CDATA[OracleVM]]></category>
		<category><![CDATA[XEN]]></category>
		<category><![CDATA[cluster]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=110</guid>
		<description><![CDATA[11/04/2009:
1) Finally got some time for cleaning up Grid Control (dropping ora2 and ora3). Secured all agents (on VMs: gc, prac1, prac2). I&#8217;ve also cleaned up XEN dom0 (from quadvm). These VMs are not needed anymore. db3.lab (RAC on prac1, prac2) is in GC. Installed 10.2.0.5 32-bit agent on srac1 (single node standby).
2) Testing application [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=110</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Oracle RAC main components&#8230; (quick self memo)</title>
		<link>http://jakub.wartak.pl/blog/?p=97</link>
		<comments>http://jakub.wartak.pl/blog/?p=97#comments</comments>
		<pubDate>Wed, 15 Apr 2009 06:47:09 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=97</guid>
		<description><![CDATA[I always forget how to resolve those shortcuts and which one does what, especially CSS versus CRS  
CSS &#8211; Cluster Synchronization Services &#8211; Component responsible for controlling which nodes are members of the clusters. When node joins or leaves the cluster, CSS notifies the other nodes of the change in configuration. If this process [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=97</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>DBMS_XPLAN.DISPLAY_CURSOR() is only for queries&#8230;</title>
		<link>http://jakub.wartak.pl/blog/?p=109</link>
		<comments>http://jakub.wartak.pl/blog/?p=109#comments</comments>
		<pubDate>Mon, 09 Mar 2009 18:56:42 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=109</guid>
		<description><![CDATA[It seems not so well know fact that the DBMS_XPLAN.DISPLAY_CURSOR() function won&#8217;t show bind variables for DML-type queries. It is documented that V$SQL_BIND_CAPTURE will capture bind variables only for SQL *queries* when bind variables are in HAVING or WHERE clauses (!). Demonstration:

SQL&#62; drop table t;

Table dropped.

SQL&#62; create table t (id number(10));

Table created.

SQL&#62; insert into t [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=109</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>New very professional blog from ex-Pythian DBA team leader. Worth reading!</title>
		<link>http://jakub.wartak.pl/blog/?p=104</link>
		<comments>http://jakub.wartak.pl/blog/?p=104#comments</comments>
		<pubDate>Tue, 03 Feb 2009 20:52:50 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=104</guid>
		<description><![CDATA[Earlier Alex Fatkulin blogged (&#38; worked) at Pythian, but now his new posts are appearing on blogspot. If you are about internals of Oracle it&#8217;s a must read!
]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=104</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>MAA challenge lab, part #2</title>
		<link>http://jakub.wartak.pl/blog/?p=105</link>
		<comments>http://jakub.wartak.pl/blog/?p=105#comments</comments>
		<pubDate>Tue, 03 Feb 2009 20:50:52 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Laboratory]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Grid Control]]></category>
		<category><![CDATA[cluster]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=105</guid>
		<description><![CDATA[25/01/2009: Cloning prac2 and adding it to Clusterware cluster (with prac1). Debugging blogged earlier Clusterware bug.
26/01/2009: Reading about migration of single instance ASM to full clustered ASM/RAC. Experiments with NOLOGGING and RMAN recovery on xeno workstation (db TEST).
27/01/2009: I&#8217;ve managed to migrate to full working RAC for db3.lab1 {nodes prac1 and prac2} with ASM storage [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=105</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Oracle Clusterware 11g addNode.sh ONS bug (with GDB fun &amp; solution)</title>
		<link>http://jakub.wartak.pl/blog/?p=103</link>
		<comments>http://jakub.wartak.pl/blog/?p=103#comments</comments>
		<pubDate>Mon, 26 Jan 2009 19:38:23 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[Oracle]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=103</guid>
		<description><![CDATA[Yesterday I&#8217;ve added new node for one of Clusterware installations. I&#8217;ve decided to use addNode.sh script. Unfortunatley after adding new node (prac2) to cluster, kernel reported every few seconds segmentation fault of ONS daemon. Here&#8217;s how one can use some in depth knowledge to solve such problems (OS: Oracle Enterprise Linux 5.1, Clusterware: 11.1.0.6, platform: [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=103</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Quick memo for myself for starting up GridControl</title>
		<link>http://jakub.wartak.pl/blog/?p=101</link>
		<comments>http://jakub.wartak.pl/blog/?p=101#comments</comments>
		<pubDate>Sat, 24 Jan 2009 12:56:48 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Grid Control]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=101</guid>
		<description><![CDATA[Starting GC (as oracle software owner):
$OMA_HOME/bin/emctl start agent
$OMS_HOME/bin/emctl start oms
$OMS_HOME/opmn/bin/opmnctl startall
.. and stopping:
$OMS_HOME/opmn/bin/opmnctl stopall
$OMA_HOME/bin/emctl stop agent
$OMS_HOME/bin/emctl stop oms
$ORACLE_HOME/bin/sqlplus /nolog &#60;&#60;EOF1
connect / as sysdba
shutdown immediate
EOF1
]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=101</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Brief description of work on my MAA challenge lab&#8230; #1</title>
		<link>http://jakub.wartak.pl/blog/?p=99</link>
		<comments>http://jakub.wartak.pl/blog/?p=99#comments</comments>
		<pubDate>Sat, 24 Jan 2009 12:52:37 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Laboratory]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[OracleVM]]></category>
		<category><![CDATA[XEN]]></category>
		<category><![CDATA[cluster]]></category>

		<guid isPermaLink="false">http://vnull.pcnet.com.pl/blog/?p=99</guid>
		<description><![CDATA[This picture below (click to enlarge) shows what I&#8217;m planning to deploy in my home lab in order to prepare better for OCP certification. It can be summarized as full Maximum Availbility Architecture implementation&#8230; Grid Control is being used to increase productivity, but I don&#8217;t want to integrate Oracle VM into the stack, just systems [...]]]></description>
		<wfw:commentRss>http://jakub.wartak.pl/blog/?feed=rss2&amp;p=99</wfw:commentRss>
		<slash:comments>1</slash:comments>
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