[chord] More questions

[adrian at softnet.tuc.gr]

Hi,

   You are wright, compute_hash(buf,d) return the same value in
defferent machines. There was a difference between the code of two
computers that I was testing on.
Sorry, for missing code of compute_hash(buf,d).

   I was trying on test_types.C to use NO_AUTH type but still I cannot
make dhash.append() to work properly. I am lost in source of SFS (aclnt).

Thanks,
Adrian.

>
>
> adrian at softnet.tuc.gr wrote:
>> Hi,
>>
>> I stuck again, and I have some questions :
>>
>> 1) The return value of compute_hash(buf,d) is indepented from my
>> hostname?
>>     If I call it from anoter computer, could it has the same value?
>>
>>
> Yes. It will have the same value. In the future, please try to consult
> the source code before asking questions like this. The function in
> question is only six semi-colons long.
>
>> 2) In test_types.C, If don't use PUB_KEY, I need sfsconst_init() and
>>     srandom(seed) ?
>>
>>
>
> I'm confused by your question. Are you modifying test_types? Since
> random () is never called in test_types.C you can safely remove the
> srandom. If you don't use any of SFS's filesystem code (NFS loopback
> servers, for instance) you probably don't need the const_init either.
>
>> 3) I use NOAUTH type(thanks for previous explanations on dhash_ctype)
>> and I
>>     store data(a string like "my name is") with a key e.x. bigint(10).
>> After it is
>>     stored, I might want to change my data to "my name is adrian".
>>     Is it possible to do it and the key will remain the same?
>>
>
> Yes, the key will be unchanged. NO_AUTH does not enfoce a relationship
> between keys and data.
>
>>     I ask this, because I run dhash.append(...) in test_types.C but I
>> don't see
>>     any changes to my initial data. I run :
>>         warn << "data (" << blk->len << " bytes) was " << str(blk->data,
>> blk->len) << "\n";
>>    in fetch_cb_append() and fetch_cb_append_second() and I always see
>>    the same result in my screen.
>>          typetest: data (23 bytes) was This is some test data
>>          typetest: data (23 bytes) was This is some test data
>>
>>    Moreover, I add '+ 1' in length of data of in
>>          dash.append(key,data,strlen(data)+1, ...)
>>
>
> There seems to be a bug in the append code. I'll take a look at it.
>
> --Frank
>>
>> Thanks,
>> Adrian.
>>
>>
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>