Merritt Service Update: March 2015
Recent Enhancements, News, and Activities
- Replication at UCLA close to completion. We are very close to having replicated all Merritt content in SDSC and UCLA data centers. There are approximately 3,000 objects left (out of a total of 1.5 million). These are large objects, either large in size or with a large number of components. Some Merritt objects are over 100 GB or have over 10,000 files.
- Performance issues. One result of the replication is that it has doubled the load on our database, as we check MD5s in both SDSC and UCLA and update database records. As a result, performance is sluggish, and we’re looking into how to optimize Merritt’s database use for this increased load.In addition, we received a very large submission of more than 120,000 objects on March 31. We’re processing these new objects, although with the increased database load described above, it’s going more slowly than we’d like. This has a couple of temporary impacts:
- Please don’t submit objects larger than 2 GB until we work through this temporary backlog. It’s fine to continue submitting objects smaller than 2GB.
- You may not see your objects show up in the UI for a day or two, while we process items in the queue.
We apologize for this temporary situation—it should be back to normal by the week of April 9.
- Scaling issues. It’s clear that we need to scale up Merritt—objects are getting larger, in both the number and size of files being submitted. We’re pleased that people are pushing Merritt’s limits, but we know that it causes some temporary degradation in performance. We are developing ways to optimize and increase capacity for submission, retrieval and other processes in response to the increased need.
- Stay in touch. Please let us know if you have any questions or concerns, particularly about the status of any content you may have already submitted or are planning to submit. Also, if you plan to submit large amounts of content, please let us know in advance so that we can be ready.
Merritt Service Description
Merritt is a production level service that provides the UC community with an easy to use tool to manage, archive, and share their content. Content can be deposited and managed via a user-interface or an API.
Merritt Service Manager
- Perry Willett firstname.lastname@example.org
Please contact us with any questions or general correspondence.
Merritt Training Materials, Guides, FAQs and Webinars
Service Monitoring and Availability
Check CDL’s system status page at http://www.cdlib.org/contact/system.html.