Specifications

Lotus Redbooks Wiki – IBM Lotus Notes and Domino V8.5 Deployment Guide

No, actually you probably won't. If you think about it, the space just before the compact -C or -B is probably

approaching steady state, and soon would be!!

Unless you let users grow their mail files to silly sizes, then they will, as a group probably have steady state

on mail received, sent, deleted and stored. But, If you don't defragment the DBs with COMPACT -b every

few days, the DBs will grow simply because there are not enough CONTIGUOUS blocks.

If you ran COMPACT -b nightly (if possible) for a week or two you would be pleasantly surprised that, rather

than seeing the disk reaching that full point on the Friday before your usual COMPACT -B, it would peak and

then achieve steady state, probably below your previously noted high water marks.

What we are saying is that the massive fragmentation of your mail files over a week is what causes you to

have such apparent size problems. The continual gentle on-line defragmentation will achieve steady state

below or close to your previous watermarks.

Another bonus is that Compact -b can be run on-line without affecting live mail or DB users (it might go a tad

slower for a minute or two, but no shutdown is required). Obviously, it is best to run it over-night or at quiet

times. You may even want to run it more than once per day. Remember, the more efficient the DB structure,

the faster the system can find and serve up the data, and the lower the over-all OS system loading will be.

As another bonus your users will be pleasantly surprised that mail access feels quicker every day of the

week, instead of just on Monday morning, because the data has been re-sequenced within the DB, and can

now be accessed more quickly, so maybe you can even add a few more users.

Summary

Dont use compact with options –c or –B, as this will increase disk fragmentation, better use compact with

lowercase b as option.

You could always do a COMPACT -B every month or two if it makes you feel better, and re-allocate the

DBIIDs. However, you will have achieved steady state long before then, and the nightly compact is keeping

things very sweet and not intentionally fragmenting your disks.

Transaction Log Optimization

Starting with Domion 8.5 you can optionally use the following Notes.ini parameter to align the block size of

your transaction logs to your OS.

CREATE_R85_LOG=1

More details are explained in the following URL:

http://www-10.lotus.com/ldd/dominowiki.nsf/dx/create_r85_log

DAOS and Attachment compression

We already know DAOS is a great space saver, but when configured in the wrong way you will not get all

the benefits you could have.

Databases can be enabled for LZ1 compression (“Compress Attachments”) to save disk space. If this option

is used in combination with DAOS, the file will first be LZ1 compressed before its written to disk.