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XrootD Development • XRootD 5.0.1-rc1 with patches is available. • Fixed x509 certificates are handled on the HTTP side. Allows certificates generated outside of VOMS • Full release in 2 weeks (week of Aug 17th) • Expect another 4.12 with backported fixes. • (Derek) Gstream? Changes being performed by Andy et. al are only for the cache stats gstream, and are configurable (can be turned on/off). ATLAS • Nothing much new. • OSG base image is failing, Mat will follow up. CMS • Working on high availability of the redirector. • If using DNS round robin, random number of packets will go to either. XRootD will look at all addresses in the DNS entry for the redirector. • If redirector goes down, client will go to which one is available. • XRootD will change behavior • Scale out for redirector is not “fantastic”. LSST is performing 4 million requests at same time. • Client DNS handling will change: • takes all addresses registered in DNS for an entry • shuffles ipv4 and ipv6 addresses, but separatly. • uses random shuffle, which is not random. • Use same sequence of addresses for every client, because not setting a seed. • Therefore, not distributing load correctly. • The fix is to use the shuffle, which is properly random. • Testing EL8 in caches. It works well. • xrootd-scitokens was broken, but new release just today may fix it. Edgar is fixing. OSG • Internet2 nodes: • Houston sent back to vendor, hardware issue • Amsterdam shipment, 3/4 machines have cleared customs. Hopefully only weeks until online. • Validation document next week. • (Derek) Will send link to Andy to the python monitoring collector