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Up Topic Rybka Support & Discussion / Rybka Discussion / Persistent Hash - extreme sizes
- - By Vasik Rajlich (Silver) Date 2008-08-12 17:10
I took a look into the issue of persistent hash files misbehaving when the file sizes are extreme and found the following:

I) Up to 1024 mb, everything is ok. The file is immediately created when the "Persistent Hash Enabled" checkbox is checked, and it has the right size. This operation can take several seconds to return. Once the file is created, everything works fine and without any significant slowdown, all the way up to 1024-mb persistent hashes.

II) At 2048 mb and above, the mechanism seems broken. The "Persistent Hash Enabled" operation returns immediately, a file of much smaller size is created, and after some searching everything slows to a crawl.

Before I add this to the FAQ, I'd like to understand if there is some sort of a Windows-level workaround. FWIW: this is all implemented using normal ::fopen (), ::fclose (), ::fread () and ::fwrite ().

Vas
Parent - - By Banned for Life (Gold) Date 2008-08-12 17:19
I have been successful generating 2GB rph files, but have not been successful when attempting to create larger files (8GB and 32 GB).

Alan
Parent - By Hetman (*****) Date 2008-08-12 17:46
May be it depends on the operating system and service package level.

Not everything depends on Rybka :-).
Parent - By Vasik Rajlich (Silver) Date 2008-08-12 18:08
Ok, thanks. My OS is XP 64-bit and AFAIK I don't have any sort of really unusual configuration.

Vas
Up Topic Rybka Support & Discussion / Rybka Discussion / Persistent Hash - extreme sizes

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