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On 7/25/2019 11:54 PM, Eddie Yen wrote:
> And I think I should gain rpc_response_timeout rather than 
> long_rpc_timeout in nova.

Since Cinder doesn't have the long_rpc_timeout option like Nova you're 
only option is to bump up the rpc_response_timeout in Cinder but that 
will be used by all RPC calls in Cinder, not just the 
initialize/terminate connection calls for attachments. Maybe that's not 
a problem, but long_rpc_timeout in Nova allows us to pick which RPC 
calls to use that on rather than everywhere. The changes to Cinder 
shouldn't be that hard if they follow the Nova patch [1].

[1] https://review.opendev.org/#/c/566696/

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Thanks,

Matt