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The rollout is planned in phases. When a gateway is added to the redirector alias (managed by echo manager), it is put in the cmsd sandbox.

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Current status

Phase 1

Single active gateway in the cmsd cluster, manager01 gets added to the xrootd alias . This substitutes gw14 in the xrootd and webdav aliases and ensures correctness of the initial change. any protocol/cmsd interaction unexpected behaviour should be caught here. Load behaviour and overheads should also become apparent.

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For small scale testing, add additional gws to rdr, this is to test small scale load balancing. having 2 gateways might lead to instabilities (load ping-pong or fallback to single gw in case the other is loaded). The gateways are from different generations to evaluate impact on each. gws are kept within the xrootd/webdav aliases to evaluate the impact of cross-alias requests and for quick rollback capability. VOs/VO reps switch a part of the transfers to the rdr aliasAtlas sends some transfer to rdr

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All gws are added to rdr and VOs switch all/most traffic to the rdr aliasone by one

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