Re: [fpc-pascal] Network compression

2017-05-23 Thread Adriaan van Os 

Dimitrios Chr. Ioannidis via fpc-pascal wrote:

Hi,

  I need to transfer data which are relative big ( 1,2 GB )using low 
memory ( 512MB, 1GB RAM ) machines.


The fastest compressor to do the job is LZ4 .

Regards,

Adriaan van Os

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Re: [fpc-pascal] Network compression

2017-05-23 Thread Graeme Geldenhuys 

On 2017-05-23 09:52, Dimitrios Chr. Ioannidis via fpc-pascal wrote:

   I've searched but I didn't find any example on how to compress /
decompress in blocks .


Take a look at how it is done in tiOPF. The unit is pretty stand-alone, 
so you don’t need to use the rest of tiOPF to make use of this unit.



https://sourceforge.net/p/tiopf/code/ci/tiopf2/tree/Options/tiCompressZLib.pas

The code should be self explanatory. There is even a tiCompressNone.pas 
which is great for testing purposes.


If you still don’t know how to use the unit, take a look at the unit 
tests, in the “UnitTests” directory, for detailed usage examples.


Regards,
  Graeme

--
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/

My public PGP key:  http://tinyurl.com/graeme-pgp
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[fpc-pascal] Network compression

2017-05-23 Thread Dimitrios Chr. Ioannidis via fpc-pascal 

Hi,

  I need to transfer data which are relative big ( 1,2 GB )using low 
memory ( 512MB, 1GB RAM ) machines.


  I was thinking something like load partial the file I ie.e a 64K 
memory block ) compress it send that compressed block via network and at 
the other end receive that block decompressed it and write it to disk, 
"repeat until done" .


  I've searched but I didn't find any example on how to compress / 
decompress in blocks .


  Any hints ?

regards,

--
Dimitrios Chr. Ioannidis
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