---------- Forwarded message ---------- From: Shai Hess <[email protected]> Date: Sat, Feb 4, 2012 at 12:43 PM Subject: MFNetDisk new featrues and tape LBI. To: [email protected]
** HI, I receive request from one of our user to support the tape LBI. LBI enables working with record length bigger than 64K to 256K for tapes So, I increase the buffer from 100K to 256K. This buffer is used for stacking many CCW and if it big it will hold more CCW and data. These buffers are fix in memory so I was not happy with the request because I saw that the paging is working harder. Eventually I come to good solution which enable the user to tune better the MFNetDisk in MF. Before the change, I set constant value which was 100K buffer size. This value was OK for me and maybe to many users, but it was not perfect to other users. So, what I have done is that the MF MFNetDisk option parameter was changed. The old value SERVER TASKS=X was changed to SERVER TASKS=X, BUFL=NNN. So, if you used this parameter in your MF, you must delete the statement or add the BUFL new parameter. The X is the same as before which is number of tasks serving the IO requests. The added parameter, BUFL, is the size of our buffer. The value can be from 66 (in kilobytes) to 260. So, if your MF real storage is big, you can specify 260. If it is small specify 66. If you specify value from 256 and higher, MFNetDisk will support automatically the LBI for tape. So, if you like LBI, you must use the SERVER parameter with NNN >= 256. If in between you can put any number you like. You can skip define the SERVER statement, and the default will be TASKS=4 and BUFL=66. So, eventually changing the code was OK with me and enable the users to control the MFNetDisk better. Someone ask me why I use the C# with old FRAMEWORK 2.0. The sad answer is that in LINUX, MONO which support the C# in LINUX, have some delay in supporting new version totally. So, In windows I can use 4.0 in Linux 2.0 work fine using the Windows forms. This force me to use the lower to make sure one code work for all C# versions. So, I make sure the GUI of MFNetDisk is work OK in both platforms. I added some documentation for SNAPSHOT backup and compression pc file. I enable the downloading of my code. Thanks, God bless you. Shai Hess, MFNetDisk product. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
