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Less known Solaris Features: Remote Mirror with AVS - Part 5: Replication Groups

Monday, March 31. 2008

A new scenario: Okay, the filesystem gets replicated now. Let´s assume that we use /dev/rdsk/c1d0s1 for a database. The filesystem and the database partition are used from the same application and it´s important, that the metadata in the database an the binary objects are in sync even when you switched over to the remote site, albeit it´s acceptable to lose the last few transactions, as both sites are 1000km away from each other and synchronous replication is not an option.

Continue reading "Less known Solaris Features: Remote Mirror with AVS - Part 5: Replication Groups"

Posted by Joerg Moellenkamp in English, Solaris at 16:53 | Comment (1) | Trackback (1)

Defined tags for this entry: avs, disaster recovery, lksf, remote mirror, solaris, storage, sun, tutorial

Nasendusche

Monday, March 31. 2008

Ich laboriere ja immer noch an der Erkaeltung von vor sechs Wochen herum, die mir auch vor etwa vier Wochen diese recht interessante Stimme bei einem Vortrag gegeben hat ... im Endeffekt ha sich das jetzt als eine Nasennebenhoehlenentzuendung chronischer Art manifestiert und die Stimme ist schon wieder weg. Jetzt scheint mich mein Arzt irgendwie quaelen zu wollen. Hat mir eine Nasendusche verschrieben. Sieht merkwuerdig aus, fuehlt sich noch merkwuerdiger an. Einzelheiten erspar ich euch mal, aber scheint zu wirken ...

Posted by Joerg Moellenkamp in German at 16:27 | Comments (10) | Trackback (1)

Unix für Männer

Monday, March 31. 2008

Ich weiss ... auch bei Solaris ist nicht alles im Reinen. Aber Kris "made my day", in dem er mir diese Links zu einem Blog geschickt hat, dessen Betreiber zur Arbeit auf AIX gezwungen wird:

Das Unix für Männer
"unverständliche Einschränkungen"
Das Unix für Männer (Teil 2)
2 GB Heap auf AIX
Das Unix für Männer (Teil 3)
Wie ein Clusterfilesystem ploetzlich readonly wird ...
Das Unix für Männer (Teil 3)
Spass beim Cluster-Failover - oder: Wie Dinge aufregend werden, die eigentlich nicht aufregend werden dürfen. Besonderes interessant finde ich allerdings, welche Auswirkungen ein an sich kleiner Fehler hat.

Posted by Joerg Moellenkamp in German at 10:36

Defined tags for this entry: solaris

Less known Solaris Features: Remote Mirror with AVS - Part 4: Testing the replication.

Sunday, March 30. 2008

One of the most essential tasks when configuring disaster recovery mechanism is training the procedure. Thus let´s test the switch into our remote datacenter. We will simulate a failure now. This will show that the data really get´s replicated to a different system

Continue reading "Less known Solaris Features: Remote Mirror with AVS - Part 4: Testing the replication."

Posted by Joerg Moellenkamp in English, Solaris at 22:53 | Comment (1) | Trackback (1)

Defined tags for this entry: avs, disaster recovery, lksf, remote mirror, solaris, storage, sun, tutorial

Less known Solaris Features: Remote Mirror with AVS - Part 3: Setting up a synchronous mirror with AVS

Sunday, March 30. 2008

After this short introduction in the theory of AVS Remote mirror, we will set up such an replication between two hosts.

Continue reading "Less known Solaris Features: Remote Mirror with AVS - Part 3: Setting up a synchronous mirror with AVS"

Posted by Joerg Moellenkamp in English, Solaris at 21:10 | Comment (1) | Trackback (1)

Defined tags for this entry: avs, disaster recovery, lksf, remote mirror, solaris, storage, sun, tutorial

Less known Solaris Features: Remote Mirror with AVS - Part 2: The fundamentals of Remote mirroring with AVS

Sunday, March 30. 2008

Some words about Sun StorageTek Availability Suite at first: We´ve opensourced the product quite a while ago. While it´s a commercial product for Solaris, we´ve integrated it into Solaris Express Community Edition and Developer Edition.

Continue reading "Less known Solaris Features: Remote Mirror with AVS - Part 2: The fundamentals of Remote mirroring with AVS"

Posted by Joerg Moellenkamp in English, Solaris at 20:49 | Trackback (1)

Defined tags for this entry: avs, disaster recovery, lksf, remote mirror, solaris, storage, sun, tutorial

Less known Solaris Features: Remote Mirror with AVS - Part 1: Introduction

Sunday, March 30. 2008

Solaris was designed with commercial customers in mind. Thus this operating environment has some capabilities that are somewhat useless for the soho user, but absolutly essential for enterprise users. One of this capabilities is remote replication of disk volumes. Imagine the following situation. You have a database and a filesystem for a central application of your company. The filesystem stores binary objects (for example images or something like that). The application is so important for your company, that you plan to build a replicated site. And now your problems start.

Continue reading "Less known Solaris Features: Remote Mirror with AVS - Part 1: Introduction"

Posted by Joerg Moellenkamp in English, Solaris at 20:43 | Trackbacks (2)

Defined tags for this entry: avs, disaster recovery, lksf, remote mirror, solaris, storage, sun, tutorial

Virtual machines and system time

Sunday, March 30. 2008

One observation with virtual machines on my Macbook Pro:

# ntpdate 130.149.17.21 30 Mar 16:58:00 ntpdate[710]: step time server 130.149.17.21 offset 82.381455 sec # ntpdate 130.149.17.21 30 Mar 16:59:07 ntpdate[711]: step time server 130.149.17.21 offset 33.485510 sec



            
            
            
                Posted by Joerg Moellenkamp
                                   in English, The IT Business                
                                    at
                 17:03

                                                            | Comments (3)


        
        

        
	

        
        
                c0t0d0s0 at Systemnews
                        Sunday, March 30. 2008
        
        
            
            
            
                c0t0d0s0 was linked at sun.systemsnews.com again. This time it´s my article about Solaris Resource Management:





I read this website for several years now as a excellent resource of information and i´m somewhat proud of seeing my articles to be linked there.
            

            
            
            
                Posted by Joerg Moellenkamp
                                   in English, Oracle                
                                    at
                 16:41

                
                
                
                Defined tags for this entry: solaris
            
        
        
        

        
	

        
        
                links for 2008-03-30
                        Sunday, March 30. 2008
        
        
            
            
            
                
	
		FSU Editorial: "The Dow is Crashing" by Mike Maloney 04/16/2007
		(tags: finance dow crash economics history)
	



            

            
            
            
                Posted by del.icio.us
                                   in del.icio.us, English                
                                    at
                 13:41


        


                txt2re
                        Saturday, March 29. 2008
        
        
            
            
            
                This tool is better than Paracetamol for programmers headaches: txt2re This web based tool can create the regular expression to gather a certain part from an example string.
            

            
            
            
                Posted by Joerg Moellenkamp
                                   in English, lost and found                
                                    at
                 20:24

                                                            | Comments (2)
                                    
                
                
                
            
        
        
        

        
	

        
        
                links for 2008-03-29
                        Saturday, March 29. 2008
        
        
            
            
            
                
	
		Gizmodo DE : Ein Traum von Unsterblichkeit
		Barcodes am Grab ...
	
	
		NUMA.3 Topology Representation : rv's techblog
		About NUMA and lgroups
		(tags: os solaris)
	



            

            
            
            
                Posted by del.icio.us
                                   in del.icio.us, English                
                                    at
                 12:39

                
                
                
                Defined tags for this entry: solaris
            
        
        
        

        
	

        
        
            
        


                Security Drama Queens
                        Friday, March 28. 2008
        
        
            
            
            
                Okay, at the first moment i was really in fear that we have installed OS images with a nasty new security vulnerability or we installed a solaris version with the infamous telnet bug, when i´ve read this Sun confirms it shipped vulnerable servers. Okay, then searching for the SunAlertSome Sun SPARC Enterprise T5120 and T5220 Servers Shipped With an Incorrect Solaris 10 Image Containing an Insecure Configuration.  Drama queens ... just a little experience from the field: We delivered a system in a configuration that many systems gets within 10 minutes after booting anyway .. with activated remote root login   Well, believe it or not ... there are customers still using telnet. The day when the last admin understands that telnet or remote direct root login are bad ideas will be the same day i´m out for figure skating in hell ...   



PS: Nevertheless, something like that should not happen ....
            

            
            
            
                Posted by Joerg Moellenkamp
                                   in English, Solaris                
                                    at
                 19:59

                                                            | Comments (8)
                                    
                
                
                Defined tags for this entry: security, solaris, sun
            
        
        
        

        
	

        
        
                Future of NFS
                        Friday, March 28. 2008
        
        
            
            
            
                Interesting article about NFS at EnterpriseStorageForum - "The Future of NFS Arrives":I believe that NFSv4.1 is going to make a number of file systems look very bad. 
            

            
            
            
                Posted by Joerg Moellenkamp
                                   in English                
                                    at
                 18:20

                
                
                
                Defined tags for this entry: nfs, storage
            
        
        
        

        
	

        
        
                TagCrowd
                        Friday, March 28. 2008
        
        
            
            
            
                Nice tool to create a tag cloud  based on a website or text



   apple archiving business c0t0d0s0 comments configuring continue crisis das data defined del der die eastern entry features filesystem hierarchical ich icio installation iscsi ist jargon joerg known less lksf mal management merry moellenkamp nicht okay posted reading samfs solaris storage sun tags technology theory trackback tutorial wed wish working zu 
created at TagCrowd.com



            

            
            
            
                Posted by Joerg Moellenkamp
                                   in English                
                                    at
                 07:21

                                                            | Comments (2)
                                    
                
                
                Defined tags for this entry: solaris, storage
            
        
        
        

        
	

        
        
            
    
    
    
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