Sanity of growing a stripped LVM volume

Quote:

However, with LVM you can easily grow a logical volume. But, you cannot use stripe mapping to add a drive to an existing striped logical volume because you can’t interleave the existing stripes with the new stripes. This link explains it fairly concisely.

    “In LVM 2, striped LVs can be extended by concatenating another set of devices onto the end of the first set. So you can get into a situation where your LV is a 2 stripe set concatenated with a linear set concatenated with a 4 stripe set.”

Taken: Pick Your Pleasure: RAID-0 mdadm Striping or LVM Striping?

tsunami-udp: faster than rsync

1. build
1. sudo apt-get install git gcc
2. sudo apt-get install automake autoconf
3. git clone git://github.com/rriley/tsunami-udp.git
4. cd tsunami-udp
5. ./recompile.sh
6. sudo make install
2. run
1. you'll need a port open to allow direct connection from client to server
1. unfortunately, this doesn't work through NAT firewalls alone
2. firewall / port forwarding
1. to server, TCP, 46224 by default
2. to client, UDP, 46224 by default
2. start up server
1. tsunamid myfile.gz
3. connect with client
1. tsunami set rate 5M connect myserver.domain.com get myfile.gz
2. it will flood your connection if you dont set rate properly
3. documentation
1. http://tsunami-udp.cvs.sourceforge.net/viewvc/tsunami-udp/docs/USAGE.txt
2. splits files automatically
3. allows wildcards when running server and client commands, "*", namely
1. client will auto-find all files served, one after the next
2. use forward-slash, i.e. get \*, for client command 
1. so bash doesn't intrepret the asterisk
4. undocumented
1. doesn't do subdirectories, better tar that up and have plenty of disk space