Re: [CentOS] caching pipe?

On 2009-09-05, at 2:32 AM, Florin Andrei florin@andrei.myip.org wrote:

Is it possible to add caching to a pipe?

cat blah | in_RAM_cache_here -s SIZE | something else

<snip>

I beleive dd does what you want.

(*) - it's actually tccat, part of the transcode package, but the idea is the same. Here's the actual command:

n=14 for i in `seq -w 1 ${n}`; do echo "${i} out of ${n}" tccat -i /dev/dvd -T 1,${i} > ch${i}.mpeg done sync ls -lh

tccat -i /dev/dvd -T 1,${i} | dd of=ch${i}.mpeg bs=1M

will read 1 MiB blocks, one at a time from tccat then write it to the file. I'm fairly certain that it doesn't write any data until either there is no more data to read or it has read a complete block.

Michael