globus_ftp_client_perf_plugin(3) Library Functions Manual globus_ftp_client_perf_plugin(3)

globus_ftp_client_perf_plugin - Performance Marker Plugin


- Performance Marker Plugin.


#define GLOBUS_FTP_CLIENT_PERF_PLUGIN_MODULE (&globus_i_ftp_client_perf_plugin_module)


typedef void(* globus_ftp_client_perf_plugin_begin_cb_t) (void *user_specific, globus_ftp_client_handle_t *handle, const char *source_url, const char *dest_url, globus_bool_t restart)
typedef void(* globus_ftp_client_perf_plugin_marker_cb_t) (void *user_specific, globus_ftp_client_handle_t *handle, time_t time_stamp_int, char time_stamp_tenth, int stripe_ndx, int num_stripes, globus_off_t nbytes)
typedef void(* globus_ftp_client_perf_plugin_complete_cb_t) (void *user_specific, globus_ftp_client_handle_t *handle, globus_bool_t success)
typedef void *(* globus_ftp_client_perf_plugin_user_copy_cb_t) (void *user_specific)
typedef void(* globus_ftp_client_perf_plugin_user_destroy_cb_t) (void *user_specific)


globus_result_t globus_ftp_client_perf_plugin_init (globus_ftp_client_plugin_t *plugin, globus_ftp_client_perf_plugin_begin_cb_t begin_cb, globus_ftp_client_perf_plugin_marker_cb_t marker_cb, globus_ftp_client_perf_plugin_complete_cb_t complete_cb, void *user_specific)
globus_result_t globus_ftp_client_perf_plugin_set_copy_destroy (globus_ftp_client_plugin_t *plugin, globus_ftp_client_perf_plugin_user_copy_cb_t copy_cb, globus_ftp_client_perf_plugin_user_destroy_cb_t destroy_cb)
globus_result_t globus_ftp_client_perf_plugin_destroy (globus_ftp_client_plugin_t *plugin)
globus_result_t globus_ftp_client_perf_plugin_get_user_specific (globus_ftp_client_plugin_t *plugin, void **user_specific)

Performance Marker Plugin.

The FTP Performance Marker plugin allows the user to obtain performance markers for all types of transfers except a third party transfer in which Extended Block mode is not enabled.

These markers may be generated internally, or they may be received from a server ('put' or third_party_transfer' only).

Copy constructor and destructor callbacks are also provided to allow one to more easily layer other plugins on top of this one.

Module descriptor

Transfer begin callback

This callback is called when a get, put, or third party transfer is started. Note that it is possible for this callback to be made multiple times before ever receiving the complete callback... this would be the case if a transfer was restarted. The 'restart' will indicate whether or not we have been restarted.

Parameters

handle this the client handle that this transfer will be occurring on
user_specific this is user specific data either created by the copy method, or, if a copy method was not specified, the value passed to init
source_url source of the transfer (GLOBUS_NULL if 'put')
dest_url dest of the transfer (GLOBUS_NULL if 'get')
restart boolean indicating whether this callback is result of a restart

Returns

•
n/a

Transfer complete callback

This callback will be called upon transfer completion (successful or otherwise)

Parameters

handle this the client handle that this transfer was occurring on
user_specific this is user specific data either created by the copy method, or, if a copy method was not specified, the value passed to init
success indicates whether this transfer completed successfully or was interrupted (by error or abort)

Returns

•
n/a

Performance marker received callback

This callback is called for all types of transfers except a third party in which extended block mode is not used (because 112 perf markers won't be sent in that case). For extended mode 'put' and '3pt', actual 112 perf markers will be used and the frequency of this callback is dependent upon the frequency those messages are received. For 'put' in which extended block mode is not enabled and 'get' transfers, the information in this callback will be determined locally and the frequency of this callback will be at a maximum of one per second.

Parameters

handle this the client handle that this transfer is occurring on
user_specific this is user specific data either created by the copy method, or, if a copy method was not specified, the value passed to init
time_stamp_int the timestamp at which the number of bytes is valid (integer part)
time_stamp_tenth the timestamp at which the number of bytes is valid (tenth part)
stripe_ndx the stripe index this data refers to
num_stripes total number of stripes involved in this transfer
nbytes the total bytes transferred on this stripe

Returns

•
n/a

Copy constructor

This callback will be called when a copy of this plugin is made, it is intended to allow initialization of a new user_specific data

Parameters

user_specific this is user specific data either created by this copy method, or the value passed to init

Returns

  • a pointer to a user specific piece of data
  • GLOBUS_NULL (does not indicate error)

Destructor

This callback will be called when a copy of this plugin is destroyed, it is intended to allow the user to free up any memory associated with the user specific data

Parameters

user_specific this is user specific data created by the copy method

Returns

•
n/a

Destroy performance marker plugin

Frees up memory associated with plugin

Parameters

plugin plugin previously initialized with init (above)

Returns

  • GLOBUS_SUCCESS
  • Error on NULL plugin

Retrieve user specific pointer

Parameters

plugin plugin previously initialized with init (above)
user_specific pointer to storage for user_specific pointer

Returns

  • GLOBUS_SUCCESS
  • Error on NULL plugin
  • Error on NULL user_specific

Initialize a perf plugin

This function initializes a performance marker plugin. Any params except for the plugin may be GLOBUS_NULL

Parameters

plugin a pointer to a plugin type to be initialized
user_specific a pointer to some user specific data that will be provided to all callbacks
begin_cb the callback to be called upon the start of a transfer
marker_cb the callback to be called with every performance marker received
complete_cb the callback to be called to indicate transfer completion

Returns

  • GLOBUS_SUCCESS
  • Error on NULL plugin
  • Error on init internal plugin

Set user copy and destroy callbacks

Use this to have the plugin make callbacks any time a copy of this plugin is being made. This will allow the user to keep state for different handles.

Parameters

plugin plugin previously initialized with init (above)
copy_cb func to be called when a copy is needed
destroy_cb func to be called when a copy is to be destroyed

Returns

  • Error on NULL arguments
  • GLOBUS_SUCCESS

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Version 9.8 globus_ftp_client