waas on SRE

[ROMAN TOMASEK]

Hi all,

I have two questions. The first is following:

1/is possible to provide caching for HTTP AO?? Or the caching of files is possible only for CIFS AO??

The second question is:

2/how large is a disk space for CIFS caching for WAAS on SRE 700 and SRE900.

Thank you very much.

Roman

[Michael Korenbaum]

Roman,

WAAS does not have object level caching for HTTP, only CIFS has an object level cache.  However, both take advantage of DRE byte level cache, and HTTP AO as of 4.2 has meta-data caching. 

http://www.cisco.com/en/US/docs/app_ntwk_services/waas/waas/v421/release/notes/ws421xrn.html#wp90802

The CIFS cache on the SRE's are 57GB and 95GB respectively for the SRE-700 and SRE-900.

Regards,

Mike Korenbaum

Cisco Data Center PDI Help Desk

http://www.cisco.com/go/pdihelpdesk

[ROMAN TOMASEK]

Hi Mike,

thank you very much for your response. I have one question, can I use CIFS for caching of pdf documents?

Roman

[Michael Korenbaum · Accepted solution]

Roman,

If your clients download these pdf files via a CIFS server, then yes the pdf file will be cached.  This of course assumes the client's TCP flow traverses two WAAS devices with the CIFS accelerator enabled, and the flow is actually optimized. Meaning both WAEs need to see the TCP 3-way handshake, you have the policy engine configured correctly (default policy engine configuration will work), and the CIFS server/client does not require SMB signing. 

Example output from CLI of CIFS optimized flow:

pdi-594-rtp#sh stat con

D:DRE,L:LZ,T:TCP Optimization RR:Total Reduction Ratio

A:AOIM,C:CIFS,E:EPM,G:GENERIC,H:HTTP,M:MAPI,N:NFS,S:SSL,V:VIDEO

ConnID        Source IP:Port          Dest IP:Port            PeerID Accel RR  

  3596     14.110.3.115:2766       14.110.3.98:445 58:8d:09:90:97:76 TCDL  70.4%

Regards,

Mike

[ROMAN TOMASEK]

thank you.

Roman