how to delete ramcache of a specific partition with icontrol rest api ?

all is a

tmsh ltm profile ramcache

option, not a catch-all meta symbol like *. If you specify a ramcache profile /Test/all, for example, BIG-IP (tmsh) looks for the profile named all under the partition /Test. If it does not find it, it reports

Invalid profile name

error. This is the reason why an iControl REST request to ~Test~all gets an error.

The all option is applied to the current partition in

tmsh show ltm profile ramcache

command. To change the partition, you need to run

cd

command in tmsh. The following example demonstrates the behaviour.

for part in " " "cd /Test;" "cd /Common;"; do echo --$part && echo "$part; \
show ltm profile ramcache all" | tmsh | egrep 'URI|Ltm::Ramcache' | grep -v apm-enduser; done
--                                         <<< default parition = /Common
Ltm::Ramcaches /Common/webacceleration
URI : /index.html
URI : /cookie.html
URI : /
--cd /Test;
Ltm::Ramcaches /Test/myweb
URI : /index.html
URI : /cookie.html
URI : /
Ltm::Ramcaches /Test/myweb2
URI : /index.html
URI : /cookie.html
URI : /
--cd /Common;
Ltm::Ramcaches /Common/webacceleration
URI : /index.html
URI : /cookie.html
URI : /

Unfortunately, we cannot use the tmsh

cd

command in iControl REST, hence all can only be used for the default partition /Common: e.g.,

 curl -sku admin:passwd https://localhost/mgmt/tm/ltm/profile/ramcache/all/stats \
| python -m json.tool | sed 's/\\n/\n/g;' | egrep 'URI|Ltm::Ramcache' | grep -v apm-enduser
        "apiAnonymous": "Ltm::Ramcaches /Common/webacceleration
URI : /index.html
URI : /cookie.html
URI : /

Interestingly, the all option behaves differently when used in

delete

command. As you stated, it deletes all the entries in all the profiles under all the partitions. Not just the current partition. Again, you can't specify partition plus all (/Test/all or ~Test~all😞 It's an option, not a wild-card.

A workaround is to loop around a list of ramcache profiles: e.g.,

 for i in myweb myweb2; do curl -sku admin:passwd \
 https://localhost/mgmt/tm/ltm/profile/ramcache/~Test~$i -X DELETE

I hope this clarifies some myths. Let me know if you have additional questions.

Cheers, Satoshi

P.S. Interestingly, although the all option appears in tab completion, it is not explained in the

tmsh help ltm profile ramcache

.