Install Over Net HowTo

2005-11-19T12:24:53Z

Xa: /* Optimizing: "gunzip ~" didn't work for me, "gunzip -" did. See man-page. */

==== Optimizing: ====

I often do such things although the above also works.
The following is faster though:

*First find out the IP of the targetcomputer:
**ifconfig -a

*Then
**echo Data is being transferred | nc -v -v -l -p 5030 | gunzip -| buffer -m 1m > /dev/hda

*While it's waiting, on the Server:
**buffer -m 1m < /dev/hda | gzip -2 | nc -v -v -w 10 192.168.0.17 5030

(Where 192.168.0.17 is the IP of the targetcomputer.)

This solution has the following pros compared to the one above:

*More efficient due to using "buffer". (You can experiment using gzip or nc or both).
*Normally "gzip -9 is used due to high compression.
*With "-w 10" on the server the data is constructed. It is not necessary to use xload: or similar for checking.

*With 3 targetcomputers 192.168.0.18 to 192.168.0.20, I would start by using the same commands on each targetcomputer, then do on the server:
**cd /tmp
**mknod pipe1 p; nc -v -v -w 10 192.168.0.18 5030 < pipe1 ~&
**mknod pipe2 p; nc -v -v -w 10 192.168.0.19 5030 < pipe2 ~&
**buffer -m 1m < /dev/hda | gzip -2 | buffer -m 1m ~|
**tee pipe1 | tee pipe2 | nc -v -v -w 10 192.168.0.20 5030

The trick here is that by the "named pipes" the hard disk on the server is read only once. This procedure also works with more than 3 target computers.==== Optimizing: ====

I often do such things although the above also works.
The following is faster though:

*First find out the IP of the targetcomputer:
**ifconfig -a

*Then
**echo Data is being transferred | nc -v -v -l -p 5030 | gunzip ~| buffer -m 1m > /dev/hda

*While it's waiting, on the Server:
**buffer -m 1m < /dev/hda | gzip -2 | nc -v -v -w 10 192.168.0.17 5030

(Where 192.168.0.17 is the IP of the targetcomputer.)

This solution has the following pros compared to the one above:

*More efficient due to using "buffer". (You can experiment using gzip or nc or both).
*Normally "gzip -9 is used due to high compression.
*With "-w 10" on the server the data is constructed. It is not necessary to use xload: or similar for checking.

*With 3 targetcomputers 192.168.0.18 to 192.168.0.20, I would start by using the same commands on each targetcomputer, then do on the server:
**cd /tmp
**mknod pipe1 p; nc -v -v -w 10 192.168.0.18 5030 < pipe1 ~&
**mknod pipe2 p; nc -v -v -w 10 192.168.0.19 5030 < pipe2 ~&
**buffer -m 1m < /dev/hda | gzip -2 | buffer -m 1m ~|
**tee pipe1 | tee pipe2 | nc -v -v -w 10 192.168.0.20 5030

The trick here is that by the "named pipes" the hard disk on the server is read only once. This procedure also works with more than 3 target computers.

[[Category: Networking]]
[[Category: Hard drive Installation]]

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Install Over Net HowTo