Performance enhancements for tendrl components

[shtripat]

There are various aspects to performance enhancements for tendrl components like

• Clustered etcd setup for load balancing
• Instead of writing tendrl objects field by field to etcd, write as a single JSON and similarly while read read as a whole and then weave the object back
• Improvements on memory consumption
• Define standard configuration for the tendrl server node and additional requirement on storage nodes for tendrl components
• Response time tuning for REST endpoints
• If possible introduce some purging mechanism for log messages pushed into etcd (maintaining a separate etcd instance for audit log could be another option)

[mbukatov]

Do I understand this right that when there is an spec pull request linked by github, I can ignore all those commits linked there? In other words, is it ok for me to review just #174 and ignore all the rest of commits and closed pull requests linked there?