memcache redundancy changes key flag

Question

Hi all,

I am using memcache in my php application. I am trying to implement redundancy by setting memcache.redundancy = 3 in memcache.ini.

When i initially set a key the value of flag is 0 (using telnet). But when I replace the value of the key the flag changes to 768.

Do you have any idea why is this happening and how to keep the key flag 0.

I am using memcache-3.0.4 on ubuntu and php 5.2.4.

Example:

Before

get i2_154
VALUE i2_154 0 4
9973
END

After

get i2_154
VALUE i2_154 768 4
9972
END

Thanks