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VXLAN in Software Defined Network
Software defined network is basically virtualized network. There is already virtualized servers, virtualized storage, so virtualized network is the next mountain to conquer. VXLAN is used to implement...
View ArticleBusiness resiliency
In disaster recovery field, business resiliency is talked a lot these years. This is a times that many concepts, whether it is same as or different from existing ones, come out quickly. As business...
View ArticleI/O Blender Effect in Virtualized I/O systems
While virtualized systems bring many advantages to the field and more and more enterprises begin to use virtualization, there are some problems or challenges to users and IT administrators. The top 1...
View ArticleSwitch over, Failover and Failback
Switch over is controlled by operators. It is a manually switch from a primary server to a standby server. It is usually planned and data is secured. Switch over is usually used for test, or for...
View ArticleUse of MONMSG in CL – Part 1
When programming on IBM i, message handling is always a part. Like programming exceptions, messages need to be captured and handled appropriately. This is more obvious in CL language on AS400(currently...
View ArticleUse of MONMSG in CL – Part 2
Let’s see another example. When we check object existence by CHKOBJ, if the object does not exist, there are 2 cases. If a library does not exist, the exceptional message is CPF9810. If the library...
View ArticleDatabase operation in CL
Usually we process a database file in RPG. But we can also process database files in CL. There are some similarities in these 2 kinds of operations are both CL and RPG are native programming model on...
View ArticleDatabase operation in CL – multiple database objects
How to access more than 1 database files in one CL program? We already know that DCLF/RCVF can be used to read a database file. To access multiple files, we need to specify some parameters in these...
View ArticleAS400 – new build in function %CHECK
Today I needed to write a CL program to check if names of save files are in the patter of Qxxxxxxxxx, where ‘xxxxxxxxx’ are 9 digits. I thought at first that I need to get each byte from position 2 and...
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AS400 – Check system version
How to check system version? Sometimes you really need it. There are some ways in CL command entry and some in program. 1. Check data area QSS1MRI Data area QSS1MRI includes current version and a...
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