On Friday, 10 November 2017 13:52:51 UTC+13, krolaw wrote:
>
> func oid2filepath(cfg *Config, oID uint64) string {
> return fmt.Sprintf("%s%c%x%c%016x", cfg.WorkDir, filepath.Separator,
> oid2vid(oID), filepath.Separator, oID)
> }
>
> On Friday, 10 November 2017 09:58:03 UTC+13, Vasiliy Tolstov wrote:
>>
>> Hi. I have server that read/write data to many files (each is about
>> 4-32Mb). To determine on which file i need to read/write i'm use this
>> function to os.OpenFile
>>
>> func oid2filepath(cfg *Config, oID uint64) string {
>> file_path := filepath.Join(cfg.WorkDir, fmt.Sprintf("%x",
>> oid2vid(oID)), fmt.Sprintf("%016x", oID))
>> return file_path
>> }
>>
>> oid2vid function get uint32 and return uint32 with shift some bits
>> path looks like (for one of 4Mb chunk) store/obj/7c2b25/007c2b2500000180
>>
>> When i'm write 4Gb data i need to call this function 1024 times for
>> single big chunk of data.
>> Does it possible to write function that does not have additional
>> allocations?
>> And does it possible to write it in portable way (i mean path separator).
>>
>>
>> --
>> Vasiliy Tolstov,
>> e-mail: v.to...@selfip.ru
>>
>
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