Deploying to new storage pools only

PSS can be deployed on new storage pools only. All vaults sharing a PSS-enabled pool would have relevant slices stored in PSS. There is no mechanism to grant PSS access on the vault level. PSS improves performance and improves disk space utilization when used in CSO mode with large number of objects under 10 MB in size. The impact is especially significant when system load is dominated by objects smaller than 100 KB. PSS could improve latency even for large objects when storage pools have a variety of object sizes.