[collectd] dispatch string values as "counter"

[Mehul Choube]

Hi,

It seems the input plugin can pass only numeric values. From plugin.h:

======= code snippet start =======

/*
* Public data types
*/
typedef unsigned long long counter_t;
typedef double gauge_t;
typedef int64_t derive_t;
typedef uint64_t absolute_t;

union value_u
{
        counter_t  counter;
        gauge_t    gauge;
        derive_t   derive;
        absolute_t absolute;
};
typedef union value_u value_t;

struct value_list_s
{
        value_t *values;
        int      values_len;
        cdtime_t time;
        cdtime_t interval;
        char     host[DATA_MAX_NAME_LEN];
        char     plugin[DATA_MAX_NAME_LEN];
        char     plugin_instance[DATA_MAX_NAME_LEN];
        char     type[DATA_MAX_NAME_LEN];
        char     type_instance[DATA_MAX_NAME_LEN];
        meta_data_t *meta;
};
typedef struct value_list_s value_list_t;

======= code snippet end =======

I want to pass string. I did look at disk and netapp plugin and it seems 
"plugin_instance" is being used to send disk label or volume name. Is there any 
other better way?



Thanks,
Mehul


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