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| − | ==Introduction==
| + | <center> |
| − | {{WARNING}}
| + | '''[[SUNScholar/Upgrading|Back to Upgrading]]''' |
| − | | + | </center> |
| − | This is the very tricky one, if you are running your server on a bare metal machine.
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| − | If your server is virtualised then this procedure is not needed.
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| − | To avoid bare metal upgrades in the future, it is highly advised that you virtualise your server. Ask central campus IT to help you with this.
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| − | If you are presently running bare metal and are going to upgrade to another bare metal server, then read the guidelines below.
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| − | | |
| − | ==Bare metal to bare metal==
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| − | These guidelines are very brief and require someone with Linux experience to execute correctly.
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| − | ===Prep new machine===
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| − | #[[SUNScholar/Install_Ubuntu|Install Ubuntu]]
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| − | #[[SUNScholar/Prepare Ubuntu|Prepare Ubuntu]]
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| − | #The new machine hostname should be temporary. For example: http://irx.sun.ac.za
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| − | | |
| − | ===Export and import contents===
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| − | #Export the PostrgeSQL DB from the old machine and import it to the new machine using "pgAdmin". See: http://www.pgadmin.org
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| − | #Put the old machine into ''maintenance mode''.
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| − | #Copy the entire '''/home/dspace''' folder from the old machine to the new machines '''/home/dspace''' folder using "rsync". See: http://en.wikipedia.org/wiki/Rsync
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| − | ===Enable Tomcat webapps on new machine===
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| − | #Follow this procedure to enable the java webapps on the new machine: http://wiki.lib.sun.ac.za/index.php/SUNScholar/Install_Dspace/S08
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| − | #Check for correct operation of DSpace on the new machine.
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| − | ===Enable "handle server" on new machine===
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| − | #Follow this step to enable the handle server: http://wiki.lib.sun.ac.za/index.php/SUNScholar/Handle_Server#Step_9_-_Start_handle_server
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| − | | |
| − | ===Swap hostnames===
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| − | #Rename the old machine. For example: http://irz.sun.ac.za. Then reboot.
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| − | #Rename the new machine so that it has the same hostname as the old machine. Then reboot.
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| − | #Check for correct operation of DSpace and handle server on the new machine.
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| − | | |
| − | ===Precautionary Principle===
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| − | Keep the old machine running for a while until the new machine is stabilised. This way you have a live backup in case of big problems.
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| − | | |
| − | ==Comparison of bare metal versus virtual machine==
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| | | | |
| − | {|class="wikitable" width="95%" | + | {{DISCLAIMER}} |
| − | |- align="center"
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| − | !
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| − | ==ir1.sun.ac.za - Bare metal==
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| − | !
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| − | ==ir2.sun.ac.za - Virtual machine==
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| − | |-
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| − | |
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| − | ==Specifications==
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| − | *CPU=24
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| − | *RAM=12
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| − | *DISK=500GB
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| − | |
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| − | ==Specifications==
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| − | *CPU=2
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| − | *RAM=4GB
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| − | *DISK=50GB
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| − | |-
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| − | ==Load==
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| − | [[File:Ir1-load-day.png]]
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| − | |
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| − | ==Load==
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| − | [[File:Ir2-load-day.png]]
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| − | |-
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| − | ==RAM==
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| − | [[File:Ir1-memory-day.png]]
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| − | ==RAM==
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| − | [[File:Ir2-memory-day.png]]
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| − | |-
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| − | ==Disk==
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| − | [[File:Ir1-df-day.png]]
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| − | |
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| − | ==Disk==
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| − | [[File:Ir2-df-day.png]]
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| − | |}
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| | | | |
| − | ==Considerations== | + | ==[[SUNScholar/Upgrading/Hardware/New Server|Upgrading to a New Server]]== |
| − | There is always a performance price when you virtualise. In addition, since DSpace is a java webapp, you should realise java is itself a virtual machine, so if you virtualise the hardware, then you are virtualising an already, virtual machine! For this reason, bare metal machines always have the best performance.
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| − | However, performance is not an issue if you have a small repository and very few people connected at one time as collection submitters/managers. If you anticipate having a big repository then you should consider going bare metal.
| + | ==[[SUNScholar/Upgrading/Hardware/Add a New Disk|Adding a New Disk]]== |
| − | | + | [[Category:System Administration]] |
| − | '''[[SUNScholar/Upgrading|Back to Upgrading]]'''
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| | __NOTOC__ | | __NOTOC__ |
