Hello David,
I used to have a Shark F20 with 8x Escon. I could easily saturate all those
channels and not even go all out on the databases. That's why we switched to a
Shark 800 with 2x Ficon. Better, but the channels can still be the bottleneck,
so we are planning on adding two more channels. I hope your Escons are at least
attached to a 17 MB/s capable cpu. If not you are getting 9 MB/s at most
compared to 1 GB/s on Ficon (or 2 GB/s on Ficon Express). Better have a look at
your fave performance tool to see what is holding you up. If it is connect time
your problem is in the channels.
This is from my system for comparison (average over several hours)
Mdisk Pa- <-Rate/s-> <------- Time (msec) -------> Req.
Links ths I/O Avoid Pend Disc Conn Serv Resp CUWt Qued
2.8 2.0 256 5.7 .3 1.6 1.0 2.9 2.9 .0 .00
> . . . . . . . . . . . . .
> ------------> <----------- Cache Utilization Data ------------>
> <-Total Rates/s-> <-------- Percentages -------->
>e (ms) ------> Read Read Write </TotWrt> <-----Hits----->
>Conn Serv Resp N-Seq Seq FW Read %DFW %CFW RdHt Wrt DFW CFW
.3 .8 .8 1.2 .5 5.8 23 100 0 89 100 100 ..
1.4 6.0 6.0 36.2 .7 1.3 97 100 0 40 100 100 ..
Best regards,
Pieter Harder
[EMAIL PROTECTED]
tel +31-73-6837133 / +31-6-47272537
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