Daos
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- The document discusses Document Attachment Object Service (DAOS), a feature introduced in Domino 8.5 that separates attachments from documents to reduce database size and improve performance. - Key aspects of DAOS include setting up a separate repository for attachments, enabling it on servers and applications, and benefits like reduced storage, faster tasks, and less network traffic. - Considerations for DAOS include prerequisites, transaction logging, backup procedures, and its effects on replication and other features.
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Daos
- 1. D A O S Ulrich Krause BLUG, 30-March-2010, Brussels
- 8. Design Note Compression Design Text Attachments Design Text Attachments
- 11. Document Body Compression Design Text Attachments Design Text Attachments
- 14. LZ1 Attachment Compression Design Text Attachments Design Text Attachments
- 15. DAOS Estimator
- 19. D A O S
- 28. The Result Design Text Attachments Design Text Tickets DAOS - Repository
- 33. DAOS and replication (last slide )
- 43. Statistics Windows: @echo off setlocal for /f "tokens=*" %%a in ('dir/w/s %1 ^|findstr "Datei(en)"') do ( set info=%%a ) echo %info% Linux: #!/bin/sh REPOSITORY=/local/daos OUTFILE=/local/daos.txt fCount=`find $REPOSITORY -type f | wc -l` fSize=`du -ksb $REPOSITORY` IFS=”/” array=($fSize) fDate=$(date +”%d-%m-%Y”) echo $fDate / $fCount / ${array[0]}>> $OUTFILE
- 48. Resources DAOS Wiki http://www-10.lotus.com/ldd/dominowiki.nsf/archive?openview&title=DAOS&type=cat&cat=null&tag=DAOS DAOS Backup and Restore http://www-10.lotus.com/ldd/dominowiki.nsf/dx/daosbackup-and-restore DAOS Estimator http://www.ibm.com/support/docview.wss?rs=463&uid=swg24021920 DAOS Technical Overview http://www.nelotus.org/A55CBA/nelotus.nsf/87fde291d7608ada852564c9006eeba5/b6523e7f4b15585b862575b5004d3488/$FILE/DAOSTechnicalOverview_NELotus.pdf
Hinweis der Redaktion
- http://www-10.lotus.com/ldd/dominowiki.nsf/dx/design-note-compression Design note compression is a feature new to Domino 8 that reduces the size of a design note by an average of 55-60 percent while also reducing I/O associated with the design. To enable this feature, you must both check the "Compress database design" advanced database property and upgrade the application to ODS 48 .
- http://www-10.lotus.com/ldd/dominowiki.nsf/dx/document-body-compression Document body compression is a feature new to 8.0.1 that reduces the size of rich text within documents by up to 60 percent. To enable this feature, you must both check the "Compress document data" advanced database property and upgrade the application to ODS 48 .
- Subject : This is due to the "small" size of you database Company name: IBM plus the way we did the lz1 upgrade work. We allocate the object in the destination db as the size of the original attachment so that we are guaranteed to have enough space in the destination db. We then compress the attachment into the this allocated space. At the end we truncate the attachment to the real size, freeing up the disk space. If you had more documents after that the freed space would be reused. Most of the time this is not an issue since the space does get reused, it's only towards the tail end of the compaction that you would see free space being left around. Since you have such a small number of documents it is quite obvious of the issue. --Steve swatts@us.ibm.com Fixed in 8.5.1 http://www-01.ibm.com/support/docview.wss?uid=swg21370344 http://www-10.lotus.com/ldd/dominowiki.nsf/dx/the-database-property-compress-document-data-can-reduce-disk-io-and-disk-space-demands http://www.eknori.de/2009-01-13/compress-design-use-with-caution/ Daniel Nashed: http://blog.nashcom.de/nashcomblog.nsf/dx/design-compression-issue.htm Explanation: Lotus Notes/Domino 6 and above uses LZ1 compression for file attachments. LZ1 stands for "Lempel-Zev class 1"; it is a different method of compression from that of the Huffman algorithm, which is the method by which Notes/Domino R5 compresses attachments. Because LZ1 compression can save a considerable amount of disk space, it is favored over the Huffman method. However, if the LZ1 compression option is set on a Domino 6 and above database, a Notes 5 client will be unable to read the compression. The Domino server converts LZ1 to Huffman compression for the Notes 5 client. This affects server performance. LZ1 compression should be exclusively implemented in a Lotus Notes/Domino 6 and above environment. Default: This property is disabled upon database creation Recommendation: Enable 'Use LZ1 compression on attachments' option in the database properties. Do this for multiple files at once via the Domino Administrator from the 'Files' tab. References: Technote 1090049 What Is LZ1 Compression in Notes/Domino 6.x? http://www.ibm.com/support/docview.wss?uid=swg21090049 Domino Configuration Tuner: This setting is included in the DCT catalog of best practices.
- DAOS will function with mail quotas depending on the quota enforcement setting that is in place. The quota enforcement settings available are: 1. Check space used in file when adding a note 2. Check filesize when extending the file 3. Check filesize when adding a note The caveat to these when using DAOS is that the attachments for the mail file are not in the mail file itself. Since this is the case, the attachments are not taken into account for space used, but are taken into account for the total file size. So if you are using "Check space used in file when adding a note", the quota will act on the physical size of the mail file (without attachments). Conversely if you are using either "Check filesize when extending the file" or "Check filesize when adding a note", quotas will act on the logical size of the mail file (taking into account attachments).
- http://www-01.ibm.com/support/docview.wss?rs=463&context=SSKTMJ&dc=DB560&dc=DB520&uid=swg21358548&loc=en_US&cs=UTF-8&lang=en&rss=ct463lotus