Test box at home - Ubuntu ext3 fs, I think about.. 2 years old.
5gb - 32k 2m24.716s 2m25.723s 2m24.012s
5gb - 64k 2m23.235s 2m25.939s
5gb - 128k 2m18.724s

11gb - 32k 5m48.613s 5m50.557s 5m55.207s
11gb - 128k 5m38.264s 5m29.513s 5m38.922s

15.5gb 128k 9m31.711s 7m45.154s 9m32.641s

Beefy server with SAN storage

14gb - 64k2m16.941s2m40.087s2m30.454s
14gb - 128k2m14.720s 2m22.201s2m26.875s

We roughly judge the penalty for failure at about 40 minutes and discard the home server results. The script penalty is about 2 and a half minutes of time and suppose the payoff is a failure rate of 0%. So I interpret loosely this to mean that, if the edit in place script fails more than once out of every sixteen runs, it is not worth running. If it fails less than once out of every sixteen runs, it is worth the risk of damaging the file, and having to redo everything.

14gb is a good estimate for how large these files will be, but when they become smaller it looks very risky to make the edit in place since the savings become smaller and the time penalty will not decrease proportionally.

In reply to Re^4: In place editing without reading further by trippledubs
in thread In place editing without reading further by trippledubs

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