Hi all, I haven't looked into it too deeply, but I was curious if Zebra would have better performance indexing with 1 large MARC file versus many small MARC files. At the moment, we generate 1 huge MARC file and then pass that to zebraidx as an argument. Is that something we've always done or was it done as a performance enhancement? I haven't looked at the Zebra internals to see whether it reads the entire file into memory and then processes it or if it parses the XML using a stream reader. Zebraidx can also take a list of files from stdin*, but if you had tonnes of small files that could be troublesome. I suppose it doesn't matter too much as we march on to ElasticSearch, but I figure lots of people are using Zebra still and probably will for a long time, so perhaps worth thinking about. https://software.indexdata.com/zebra/doc/zebraidx.html David Cook Systems Librarian Prosentient Systems 72/330 Wattle St Ultimo, NSW 2007 Australia Office: 02 9212 0899 Direct: 02 8005 0595