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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>To answer my own question…<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I have a zebraidx running on 461MB (or 77000 records) and it’s only using 2% of memory on a 4GB system, so I’m thinking it is using a stream reader and updating the shadow files on disk as it goes through the massive MARC file.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>In that case, while it might be slow to export records to that file, zebraidx probably does read 1 large file much faster than many small files. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='color:#1F497D'>David Cook<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Systems Librarian<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Prosentient Systems<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>72/330 Wattle St<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Ultimo, NSW 2007<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Australia<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Office: 02 9212 0899<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Direct: 02 8005 0595<o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> koha-devel-bounces@lists.koha-community.org [mailto:koha-devel-bounces@lists.koha-community.org] <b>On Behalf Of </b>David Cook<br><b>Sent:</b> Monday, 4 February 2019 5:10 PM<br><b>To:</b> 'Koha Devel' <koha-devel@lists.koha-community.org><br><b>Cc:</b> tomascohen@theke.io<br><b>Subject:</b> [Koha-devel] zebraidx with 1 large MARC file rather than many small MARC files<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>At the moment, we generate 1 huge MARC file and then pass that to zebraidx as an argument. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is that something we’ve always done or was it done as a performance enhancement? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="https://software.indexdata.com/zebra/doc/zebraidx.html">https://software.indexdata.com/zebra/doc/zebraidx.html</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>David Cook<o:p></o:p></p><p class=MsoNormal>Systems Librarian<o:p></o:p></p><p class=MsoNormal>Prosentient Systems<o:p></o:p></p><p class=MsoNormal>72/330 Wattle St<o:p></o:p></p><p class=MsoNormal>Ultimo, NSW 2007<o:p></o:p></p><p class=MsoNormal>Australia<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Office: 02 9212 0899<o:p></o:p></p><p class=MsoNormal>Direct: 02 8005 0595<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>