[lustre-discuss] lfs setstripe resets all values to default

[Anna Fuchs]

Dear all, 

when you set a single parameter via lfs setstripe, all the other
parameters will be reset to default values. Is that behavior desired? I
would expect to overwrite the certain parameter and leave everything
else as it was. 

$ mkdir /mnt/client0/test
$ lfs getstripe /mnt/client0/test
/mnt/client0/test
stripe_count:   1 stripe_size:    1048576 stripe_offset:  -1
$ lfs setstripe --stripe-count 2 /mnt/client0/test
$ lfs getstripe /mnt/client0/test
/mnt/client0/test
stripe_count:   2 stripe_size:    1048576 stripe_offset:  -1
$ lfs setstripe --stripe-size 131072  /mnt/client0/test
$ lfs getstripe /mnt/client0/test
/mnt/client0/test
stripe_count:   1 stripe_size:    131072 stripe_offset:  -1

Reason:
lustre/utils/lfs.c:974++

	st_size = 0;
	st_offset = -1;
	st_count = 0;


It is not a big deal, but seems counterintuitive to me and is
uncomfortable for testing. One could initialize the three variables
with last used values. What do you think?

Regards,
Anna