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--- tsm:tsm_perf_client [2021/01/05 13:50]
manu
+++ tsm:tsm_perf_client [2021/01/05 17:21] (current)
manu
@@ Line 13: / Line 13: @@
 Many of you know that this simply changes the restore from the post TSM 3.1 “No Query Restore” back to the older “Classic” restore.
+===== TSM client network improvements =====
+Do not use client dedup nor compression if you backup on containers. Data reduction on client side will preserve your bandwith, but ask to TSM admin before.
+  * **TCPWINDOWSIZE**: Specifies the size, in kilobytes, to use for your client node TCP/IP sliding window. The range of values is 0 through 2048. A value of 0 allows the client to use the operating system default TCP window size. Values from 1 to 2048 indicate that the window size is in the range of 1KB to 2MB. If you specify a value less than 1, the TCP window size defaults to 1. If you specify a value greater than 2048, the TCP window size defaults to 2048.
+For backup-archive clients, the default value for this parameter is 63 KB on AIX and Solaris. And 0, the OS default, on the other platforms Linux, Windows and Mac.
+For IBM Spectrum Protect for Virtual Environments: Data Protection for VMware, the default value for this parameter is 512 KB.
+  * **RESOURceutilization**: Specifies the level of resources the IBM Spectrum Protect server and client can use during processing. The range of values that you can specify is 1 - 100. The default value is 2.
+  * **TCPBuffsize**: The tcpbuffsize option specifies the size of the internal TCP/IP communication buffer used to transfer data between the client node and server. Although it uses more memory, a larger buffer can improve communication performance.
+The best way to find the best parameter is using command line like this:
+<cli prompt='>'>
+C:\Users\admin> dsmc ba c:\tmp\my_big.iso -resourceutilization=10 -tcpwindowsize=32
+</cli>
+<code>
+Backup-Archive client with limited, high latency network (WAN backups):
+===============================
+TCPWINDOWSIZE           512
+RESOURCEUTILIZATION     4
+COMPRESSION             Yes
+DEDUPLICATION           Yes
+ENABLEDEDUPCACHE        Yes
+</code>
+Tip:  Do not use the client deduplication caching for applications that use the
+IBM Spectrum Protect API (TDP).
+<code>
+Backup/Archive client or Client API with limited network (Gigabit LAN backups):
+===============================
+TCPWINDOWSIZE           512
+RESOURCEUTILIZATION     10
+COMPRESSION             Yes
+DEDUPLICATION           Yes
+ENABLEDEDUPCACHE        No
+</code>
+<code>
+Backup/Archive client or Client API with high speed network (10 Gigabit LAN backups)
+===============================
+TCPWINDOWSIZE           512
+RESOURCEUTILIZATION     10
+COMPRESSION             No
+DEDUPLICATION           No
+ENABLEDEDUPCACHE        No
+</code>
+  * **TCPBUFFSIZE**: The tcpbuffsize option specifies the size of the internal TCP/IP communication buffer used to transfer data between the client node and server. Although it uses more memory, a larger buffer can improve communication performance. Specifies the size, in kilobytes, that you want to use for the internal TCP/IP communication buffer. The range of values is 1 through 512; the default is 32. Depending on the operating system communication settings, your system might not accept all values in the range of 1 through 512.
 ===== Backup with TDP MSSQL =====

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