Hello Everyone, I am working on a Project-Based on ceph which Integrates
PDC API with Ceph Rados with the help of librados Library.
I am working under the UC Santa Cruz organization Under the Google summer
of code 2021 Program. I am stuck at storing the Key-Value(integer form)
Pairs in RADOS.
I tried running the code, but I am unable to read the values from
associated keys, Can anyone please help me in reading/Write operations of
Key-value pairs.
My dummy code is :
rados_write_op_t write_op = rados_create_write_op();
printf("Created an Func for Object Operations");
rados_write_op_create(write_op(),LIBRADOS_CREATE_EXCLUSIVE, NULL);
printf("Created an Object For operation");
size_t p = 2; //No.of key value Pairs
char *key1="key1", *key2 = "key2"; //keys
char *key_arr[2] = {key1,key2}; //Pointer array to keys
int v1 = 21,v2 = 22; //values to associate to each key (integer
form)
int *vals[2] = {&v1,&v2}; //pointer array storing the location of
values to set
int lens[2] = {4,4};
rados_write_op_omap_set(write_op, key_arr, vals, lens, p); //func
used to set those key-value pairs
printf("Set the key/value pairs on an object\n");
rados_write_op_operate(write_op,io,"keytest",NULL,0); //operated on
object "keytest"
rados_release_write_op(write_op);
rados_read_op_t read_op = rados_create_read_op();
rados_omap_iter_t iter_vals;
int r_vals;
rados_read_op_omap_get_vals_by_keys(read_op,key_arr,p,&iter_vals,&r_vals);
//To read the values of keys
rados_read_op_operate(read_op,io,"keytest",0);
printf("%D\n",r_vals);
rados_release_read_op(read_op);
Thanks
Mishal
LNM IIT JAIPUR
India
hi folks,
"This branch is out-of-date with the base branch" this message started
to show up in the github PR web pages recently. and next to it is an
"Update branch" button.
i think the reason is that some of us change the per-branch "Branch
protection rule" of "master" branch of ceph project in github. there
is an option named "Require branches to be up to date before merging",
if it is enabled, per the description of this policy:
> This ensures pull requests targeting a matching branch have been tested with the latest code. This setting will not take effect unless at least one status check is enabled (see below).
in other words,
1. it's required to pass some status checks to merge a PR
2. if another change is merged after all the status checks passed in
your PR, these status checks results are invalidated, and you are
supposed to rebase your change against master. and the repush
re-triggers the status checks. the new result is used
as a prerequisite of merging the PR instead of the old one.
i see there is a good reason to enable the option. as it helps to
prevent us from merging conflicting changes whose status checks pass
individually. but these changes could break build or test if they are
tested together.
but the downside is:
- developers are tempted to push the "Update branch" button next to
the warning message. this helps the change to comply the "up to date
before merging" policy, but it breaks our policy requiring a PR to
avoid including any merge commit in it.
because it introduces a merge commit into the PR in question.
- the extra overhead of rebasing and repushing dance.
is it a plausible alternative to require the maintainer who pushes the
merge button to retrigger the test if the change to be merged is kind
of old? i know, it's difficult to measure "old", and it's difficult to
enforce a policy like this instead of leaving it to a system.. but
it's more sustainable this way, i think.
BTW, i think, the "stale test result of a snapshot" issue also applies
to the integration test, a.k.a., qa suite test.
--
Regards
Kefu Chai
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