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boinc/sched/sched_send.C

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static volatile const char *BOINCrcsid="$Id$";
// The contents of this file are subject to the BOINC Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://boinc.berkeley.edu/license_1.0.txt
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
// scheduler code related to sending work
#include <vector>
#include <string>
#include <ctime>
#include <cstdio>
using namespace std;
#include "error_numbers.h"
#include "server_types.h"
#include "sched_shmem.h"
#include "sched_config.h"
#include "sched_util.h"
#include "main.h"
#include "sched_msgs.h"
#include "sched_send.h"
#include "sched_locality.h"
#ifdef _USING_FCGI_
#include "fcgi_stdio.h"
#endif
const int MIN_SECONDS_TO_SEND = 0;
const int MAX_SECONDS_TO_SEND = (28*SECONDS_IN_DAY);
const double MIN_POSSIBLE_RAM = 64000000;
bool anonymous(PLATFORM& platform) {
return (!strcmp(platform.name, "anonymous"));
}
bool SCHEDULER_REQUEST::has_version(APP& app) {
unsigned int i;
for (i=0; i<client_app_versions.size(); i++) {
CLIENT_APP_VERSION& cav = client_app_versions[i];
if (!strcmp(cav.app_name, app.name) && cav.version_num >= app.min_version) {
return true;
}
}
return false;
}
// compute the max additional disk usage we can impose on the host
//
double max_allowable_disk(SCHEDULER_REQUEST& req) {
// ROMW: Reverting back to older implementation until all clients are 4.x
// or higher.
#if 1
HOST host = req.host;
GLOBAL_PREFS prefs = req.global_prefs;
double x1, x2, x3, x;
// fill in default values for missing prefs
//
if (prefs.disk_max_used_gb == 0) prefs.disk_max_used_gb = 0.1; // 100 MB
if (prefs.disk_max_used_pct == 0) prefs.disk_max_used_pct = 10;
// min_free_gb can be zero
// default values for BOINC disk usage (project and total) is zero
//
// no defaults for total/free disk space (host.d_total, d_free)
// if they're zero, project will get no work.
//
x1 = prefs.disk_max_used_gb*1e9 - req.total_disk_usage;
x2 = host.d_total*prefs.disk_max_used_pct/100.;
x3 = host.d_free - prefs.disk_min_free_gb*1e9; // may be negative
x = min(x1, min(x2, x3));
if (x < 0) {
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"disk_max_used_gb %f disk_max_used_pct %f disk_min_free_gb %f\n",
prefs.disk_max_used_gb, prefs.disk_max_used_pct,
prefs.disk_min_free_gb
);
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"req.total_disk_usage %f host.d_total %f host.d_free %f\n",
req.total_disk_usage, host.d_total, host.d_free
);
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"x1 %f x2 %f x3 %f x %f\n",
x1, x2, x3, x
);
}
return x;
#else
double x1, x2, x3;
HOST host = req.host;
x1 = req.project_disk_free;
x2 = req.potentially_free_offender;
x3 = req.potentially_free_self;
if (x1 < 0) {
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"req.project_disk_free_gb %f\n",
x1
);
}
return max(max(x1,x2), x3);
#endif
}
// if a host has active_frac < 0.1, assume 0.1 so we don't deprive it of work.
//
const double HOST_ACTIVE_FRAC_MIN = 0.1;
// estimate the number of seconds that a workunit requires running 100% on a
// single CPU of this host.
//
// TODO: improve this. take memory bandwidth into account
//
static double estimate_cpu_duration(WORKUNIT& wu, HOST& host) {
if (host.p_fpops <= 0) host.p_fpops = 1e9;
if (wu.rsc_fpops_est <= 0) wu.rsc_fpops_est = 1e12;
return wu.rsc_fpops_est/host.p_fpops;
}
// estimate the amount of real time to complete this WU,
// taking into account active_frac and resource_share_fraction
//
static double estimate_wallclock_duration(
WORKUNIT& wu, HOST& host, double resource_share_fraction
) {
return estimate_cpu_duration(wu, host)
/ (max(HOST_ACTIVE_FRAC_MIN, host.active_frac)*resource_share_fraction)
;
}
// return false if the WU can't be executed on the host
// because of insufficient memory, CPU speed, or resource share
//
static bool wu_is_feasible(
WORKUNIT& wu, HOST& host, WORK_REQ& wreq,
double resource_share_fraction, double estimated_delay
) {
double m_nbytes = host.m_nbytes;
if (m_nbytes < MIN_POSSIBLE_RAM) m_nbytes = MIN_POSSIBLE_RAM;
if (wu.rsc_memory_bound > m_nbytes) {
log_messages.printf(
SCHED_MSG_LOG::DEBUG, "[WU#%d %s] needs %f mem; [HOST#%d] has %f\n",
wu.id, wu.name, wu.rsc_memory_bound, host.id, m_nbytes
);
wreq.insufficient_mem = true;
return false;
}
if (config.enforce_delay_bound) {
double wu_wallclock_time =
estimate_wallclock_duration(wu, host, resource_share_fraction);
double host_remaining_time = estimated_delay;
if (host_remaining_time + wu_wallclock_time > wu.delay_bound) {
log_messages.printf(
SCHED_MSG_LOG::DEBUG, "[WU#%d %s] needs requires %d seconds on [HOST#%d]; delay_bound is %d\n",
wu.id, wu.name, (int)wu_wallclock_time, host.id, wu.delay_bound
);
wreq.insufficient_speed = true;
return false;
}
}
return true;
}
// insert "text" right after "after" in the given buffer
//
int insert_after(char* buffer, char* after, char* text) {
char* p;
char temp[LARGE_BLOB_SIZE];
if (strlen(buffer) + strlen(text) > LARGE_BLOB_SIZE-1) {
log_messages.printf(SCHED_MSG_LOG::NORMAL, "insert_after: overflow\n");
return ERR_BUFFER_OVERFLOW;
}
p = strstr(buffer, after);
if (!p) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL, "insert_after: %s not found in %s\n", after, buffer);
return ERR_NULL;
}
p += strlen(after);
strcpy(temp, p);
strcpy(p, text);
strcat(p, temp);
return 0;
}
// add elements to WU's xml_doc, in preparation for sending
// it to a client
//
int insert_wu_tags(WORKUNIT& wu, APP& app) {
char buf[LARGE_BLOB_SIZE];
sprintf(buf,
" <rsc_fpops_est>%f</rsc_fpops_est>\n"
" <rsc_fpops_bound>%f</rsc_fpops_bound>\n"
" <rsc_memory_bound>%f</rsc_memory_bound>\n"
" <rsc_disk_bound>%f</rsc_disk_bound>\n"
" <name>%s</name>\n"
" <app_name>%s</app_name>\n",
wu.rsc_fpops_est,
wu.rsc_fpops_bound,
wu.rsc_memory_bound,
wu.rsc_disk_bound,
wu.name,
app.name
);
return insert_after(wu.xml_doc, "<workunit>\n", buf);
}
// return the APP and APP_VERSION for the given WU, for the given platform.
// return false if none
//
bool find_app_version(
WORK_REQ& wreq, WORKUNIT& wu, PLATFORM& platform, SCHED_SHMEM& ss,
APP*& app, APP_VERSION*& avp
) {
app = ss.lookup_app(wu.appid);
if (!app) {
log_messages.printf(
SCHED_MSG_LOG::CRITICAL, "Can't find APP#%d\n", wu.appid
);
return false;
}
avp = ss.lookup_app_version(app->id, platform.id, app->min_version);
if (!avp) {
log_messages.printf(
SCHED_MSG_LOG::DEBUG,
"no app version available: APP#%d PLATFORM#%d min_version %d\n",
app->id, platform.id, app->min_version
);
wreq.no_app_version = true;
return false;
}
return true;
}
// verify that the given APP_VERSION will work with the core client
//
bool app_core_compatible(WORK_REQ& wreq, APP_VERSION& av) {
if (wreq.core_client_version < av.min_core_version) {
#if 0
log_messages.printf(
SCHED_MSG_LOG::DEBUG,
"Outdated core version: wanted %d, got %d\n",
av.min_core_version, wreq.core_client_version
);
#endif
wreq.outdated_core = true;
return false;
}
return true;
}
// add the given workunit to a reply.
// look up its app, and make sure there's a version for this platform.
// Add the app and app_version to the reply also.
//
int add_wu_to_reply(
WORKUNIT& wu, SCHEDULER_REPLY& reply, PLATFORM& platform,
WORK_REQ& wreq, APP* app, APP_VERSION* avp
) {
int retval;
WORKUNIT wu2;
// add the app, app_version, and workunit to the reply,
// but only if they aren't already there
//
if (avp) {
reply.insert_app_unique(*app);
reply.insert_app_version_unique(*avp);
log_messages.printf(
SCHED_MSG_LOG::DEBUG,
"[HOST#%d] Sending app_version %s %s %d\n",
reply.host.id, app->name, platform.name, avp->version_num
);
}
// add time estimate to reply
//
wu2 = wu; // make copy since we're going to modify its XML field
retval = insert_wu_tags(wu2, *app);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::NORMAL, "insert_wu_tags failed\n");
return retval;
}
reply.insert_workunit_unique(wu2);
return 0;
}
int insert_name_tags(RESULT& result, WORKUNIT const& wu) {
char buf[256];
int retval;
sprintf(buf, "<name>%s</name>\n", result.name);
retval = insert_after(result.xml_doc_in, "<result>\n", buf);
if (retval) return retval;
sprintf(buf, "<wu_name>%s</wu_name>\n", wu.name);
retval = insert_after(result.xml_doc_in, "<result>\n", buf);
if (retval) return retval;
return 0;
}
int insert_deadline_tag(RESULT& result) {
char buf[256];
sprintf(buf, "<report_deadline>%d</report_deadline>\n", result.report_deadline);
int retval = insert_after(result.xml_doc_in, "<result>\n", buf);
if (retval) return retval;
return 0;
}
static int update_wu_transition_time(WORKUNIT wu, time_t x) {
DB_WORKUNIT dbwu;
char buf[256];
dbwu.id = wu.id;
sprintf(buf, "transition_time=%d", (int)x);
return dbwu.update_field(buf);
}
// return true iff a result for same WU is already being sent
//
static bool wu_already_in_reply(WORKUNIT& wu, SCHEDULER_REPLY& reply) {
unsigned int i;
for (i=0; i<reply.results.size(); i++) {
if (wu.id == reply.results[i].workunitid) {
return true;
}
}
return false;
}
// modified by Pietro Cicotti
// Check that the two platform has the same architecture and operating system
// Architectures: AMD, Intel, Macintosh
// OS: Linux, Windows, Darwin, SunOS
const int unspec = 0;
const int nocpu = 1;
const int Intel = 2;
const int AMD = 3;
const int Macintosh = 4;
const int noos = 128;
const int Linux = 256;
const int Windows = 384;
const int Darwin = 512;
const int SunOS = 640;
inline
int OS(SCHEDULER_REQUEST& sreq){
if ( strstr(sreq.host.os_name, "Linux") != NULL ) return Linux;
else if( strstr(sreq.host.os_name, "Windows") != NULL ) return Windows;
else if( strstr(sreq.host.os_name, "Darwin") != NULL ) return Darwin;
else if( strstr(sreq.host.os_name, "SunOS") != NULL ) return SunOS;
else return noos;
};
inline
int CPU(SCHEDULER_REQUEST& sreq){
if ( strstr(sreq.host.p_vendor, "Intel") != NULL ) return Intel;
else if( strstr(sreq.host.p_vendor, "AMD") != NULL ) return AMD;
else if( strstr(sreq.host.p_vendor, "Macintosh") != NULL ) return Macintosh;
else return nocpu;
};
#if 0
// old version, just in case
bool same_platform(DB_HOST& host, SCHEDULER_REQUEST& sreq) {
return !strcmp(host.os_name, sreq.host.os_name)
&& !strcmp(host.p_vendor, sreq.host.p_vendor);
}
#endif
// return true if we've already sent a result of this WU to a different platform
// (where "platform" is os_name + p_vendor;
// may want to sharpen this for Unix)
//
static bool already_sent_to_different_platform(
SCHEDULER_REQUEST& sreq, WORKUNIT& workunit, WORK_REQ& wreq
) {
DB_WORKUNIT db_wu;
int retval, wsn=0;
char buf[256];
// reread workseq_next field from DB in case it's changed
//
db_wu.id = workunit.id;
retval = db_wu.get_field_int("workseq_next", wsn);
if (retval) {
log_messages.printf(
SCHED_MSG_LOG::CRITICAL, "can't get workseq_next for %d: %d\n",
db_wu.id, retval
);
return true;
}
wreq.homogeneous_redundancy_reject = false;
if (wsn != unspec) {
if (OS(sreq) + CPU(sreq) != wsn) {
wreq.homogeneous_redundancy_reject = true;
}
} else {
wsn = OS(sreq) + CPU(sreq);
sprintf(buf, "workseq_next=%d", wsn);
db_wu.update_field(buf);
}
return wreq.homogeneous_redundancy_reject;
}
void lock_sema() {
lock_semaphore(sema_key);
}
void unlock_sema() {
unlock_semaphore(sema_key);
}
bool WORK_REQ::work_needed(SCHEDULER_REPLY& reply) {
if (seconds_to_fill <= 0) return false;
if (disk_available <= 0) return false;
if (nresults >= config.max_wus_to_send) return false;
if (config.daily_result_quota) {
if (reply.host.nresults_today >= config.daily_result_quota) {
daily_result_quota_exceeded = true;
return false;
}
}
return true;
}
int add_result_to_reply(
DB_RESULT& result, WORKUNIT& wu, SCHEDULER_REPLY& reply, PLATFORM& platform,
WORK_REQ& wreq, APP* app, APP_VERSION* avp
) {
int retval;
double wu_seconds_filled;
retval = add_wu_to_reply(wu, reply, platform, wreq, app, avp);
if (retval) return retval;
wreq.disk_available -= wu.rsc_disk_bound;
// update the result in DB
//
result.server_state = RESULT_SERVER_STATE_IN_PROGRESS;
result.hostid = reply.host.id;
result.userid = reply.user.id;
result.sent_time = time(0);
result.report_deadline = result.sent_time + wu.delay_bound;
result.update_subset();
wu_seconds_filled = estimate_cpu_duration(wu, reply.host);
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"[HOST#%d] Sending [RESULT#%d %s] (fills %d seconds)\n",
reply.host.id, result.id, result.name, int(wu_seconds_filled)
);
retval = update_wu_transition_time(wu, result.report_deadline);
if (retval) {
log_messages.printf(
SCHED_MSG_LOG::CRITICAL,
"send_work: can't update WU transition time\n"
);
}
// The following overwrites the result's xml_doc field.
// But that's OK cuz we're done with DB updates
//
retval = insert_name_tags(result, wu);
if (retval) {
log_messages.printf(
SCHED_MSG_LOG::CRITICAL, "send_work: can't insert name tags\n"
);
}
retval = insert_deadline_tag(result);
if (retval) {
log_messages.printf(
SCHED_MSG_LOG::CRITICAL,
"send_work: can't insert deadline tag\n"
);
}
reply.insert_result(result);
wreq.seconds_to_fill -= wu_seconds_filled;
wreq.nresults++;
reply.host.nresults_today++;
return 0;
}
// Make a pass through the wu/results array, sending work.
// If "infeasible_only" is true, send only results that were
// previously infeasible for some host
//
static void scan_work_array(
WORK_REQ& wreq,
SCHEDULER_REQUEST& sreq, SCHEDULER_REPLY& reply, PLATFORM& platform,
SCHED_SHMEM& ss
) {
int i, retval, n;
WORKUNIT wu;
DB_RESULT result;
char buf[256];
APP* app;
APP_VERSION* avp;
bool found;
if (wreq.disk_available < 0) wreq.insufficient_disk = true;
lock_sema();
for (i=0; i<ss.nwu_results; i++) {
if (!wreq.work_needed(reply)) break;
WU_RESULT& wu_result = ss.wu_results[i];
// do fast checks on this wu_result;
// i.e. ones that don't require DB access
// if any check fails, continue
if (wu_result.state != WR_STATE_PRESENT && wu_result.state != g_pid) {
continue;
}
if (wreq.infeasible_only && (wu_result.infeasible_count==0)) {
continue;
}
if (wu_result.workunit.rsc_disk_bound > wreq.disk_available) {
wreq.insufficient_disk = true;
wu_result.infeasible_count++;
continue;
}
// don't send if we're already sending a result for same WU
//
if (config.one_result_per_user_per_wu) {
if (wu_already_in_reply(wu_result.workunit, reply)) {
continue;
}
}
// don't send if host can't handle it
//
wu = wu_result.workunit;
if (!wu_is_feasible(
wu, reply.host, wreq, sreq.resource_share_fraction,
sreq.estimated_delay
)) {
log_messages.printf(
SCHED_MSG_LOG::DEBUG, "[HOST#%d] [WU#%d %s] WU is infeasible\n",
reply.host.id, wu.id, wu.name
);
wu_result.infeasible_count++;
continue;
}
// Find the app and app_version for the client's platform.
// If none, treat the WU as infeasible
//
if (anonymous(platform)) {
app = ss.lookup_app(wu.appid);
found = sreq.has_version(*app);
if (!found) {
continue;
}
avp = NULL;
} else {
found = find_app_version(wreq, wu, platform, ss, app, avp);
if (!found) {
wu_result.infeasible_count++;
continue;
}
// see if the core client is too old.
// don't bump the infeasible count because this
// isn't the result's fault
//
if (!app_core_compatible(wreq, *avp)) {
continue;
}
}
// end of fast checks - mark wu_result as checked out and release sema.
// from here on in this loop, don't continue on failure;
// instead, goto dont_send (so that we reacquire semaphore)
wu_result.state = WR_STATE_CHECKED_OUT;
unlock_sema();
// Don't send if we've already sent a result of this WU to this user.
//
if (config.one_result_per_user_per_wu) {
sprintf(buf,
"where workunitid=%d and userid=%d",
wu_result.workunit.id, reply.user.id
);
retval = result.count(n, buf);
if (retval) {
log_messages.printf(
SCHED_MSG_LOG::CRITICAL,
"send_work: can't get result count (%d)\n", retval
);
goto dont_send;
} else {
if (n>0) {
log_messages.printf(
SCHED_MSG_LOG::DEBUG,
"send_work: user %d already has %d result(s) for WU %d\n",
reply.user.id, n, wu_result.workunit.id
);
goto dont_send;
}
}
}
// if desired, make sure redundancy is homogeneous
//
if (config.homogeneous_redundancy || app->homogeneous_redundancy) {
if (already_sent_to_different_platform(
sreq, wu_result.workunit, wreq
)) {
goto dont_send;
}
}
result.id = wu_result.resultid;
// mark slot as empty AFTER we've copied out of it
// (since otherwise feeder might overwrite it)
//
wu_result.state = WR_STATE_EMPTY;
// reread result from DB, make sure it's still unsent
// TODO: from here to update() should be a transaction
//
retval = result.lookup_id(result.id);
if (retval) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL,
"[RESULT#%d] result.lookup_id() failed %d\n",
result.id, retval
);
goto done;
}
if (result.server_state != RESULT_SERVER_STATE_UNSENT) {
log_messages.printf(SCHED_MSG_LOG::DEBUG,
"[RESULT#%d] expected to be unsent; instead, state is %d\n",
result.id, result.server_state
);
goto done;
}
if (result.workunitid != wu.id) {
log_messages.printf(SCHED_MSG_LOG::CRITICAL,
"[RESULT#%d] wrong WU ID: wanted %d, got %d\n",
result.id, wu.id, result.workunitid
);
goto done;
}
// ****** HERE WE'VE COMMITTED TO SENDING THIS RESULT TO HOST ******
//
retval = add_result_to_reply(
result, wu, reply, platform, wreq, app, avp
);
if (!retval) goto done;
dont_send:
// here we couldn't send the result for some reason --
// set its state back to PRESENT
//
wu_result.state = WR_STATE_PRESENT;
done:
lock_sema();
}
unlock_sema();
}
int send_work(
SCHEDULER_REQUEST& sreq, SCHEDULER_REPLY& reply, PLATFORM& platform,
SCHED_SHMEM& ss
) {
WORK_REQ wreq;
memset(&wreq, 0, sizeof(wreq));
// ROMW: Reverting back to older implementation until all clients are 4.x
// or higher.
#if 1
wreq.disk_available = max_allowable_disk(sreq);
#else
wreq.disk_available = sreq.project_disk_free;
#endif
wreq.insufficient_disk = false;
wreq.insufficient_mem = false;
wreq.insufficient_speed = false;
wreq.no_app_version = false;
wreq.homogeneous_redundancy_reject = false;
wreq.daily_result_quota_exceeded = false;
wreq.core_client_version = sreq.core_client_major_version*100
+ sreq.core_client_minor_version;
wreq.nresults = 0;
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"[HOST#%d] got request for %d seconds of work; available disk %f GB\n",
reply.host.id, sreq.work_req_seconds, wreq.disk_available/1e9
);
if (sreq.work_req_seconds <= 0) return 0;
wreq.seconds_to_fill = sreq.work_req_seconds;
if (wreq.seconds_to_fill > MAX_SECONDS_TO_SEND) {
wreq.seconds_to_fill = MAX_SECONDS_TO_SEND;
}
if (wreq.seconds_to_fill < MIN_SECONDS_TO_SEND) {
wreq.seconds_to_fill = MIN_SECONDS_TO_SEND;
}
if (config.locality_scheduling) {
wreq.infeasible_only = false;
send_work_locality(sreq, reply, platform, wreq, ss);
} else {
// give priority to results that were infeasible for some other host
//
wreq.infeasible_only = true;
scan_work_array(wreq, sreq, reply, platform, ss);
wreq.infeasible_only = false;
scan_work_array(wreq, sreq, reply, platform, ss);
}
#if 0
// huh???
if (wreq.nresults == 0) {
wreq.disk_available = sreq.potentially_free_offender;
scan_work_array(wreq, sreq, reply, platform, ss);
}
if (wreq.nresults == 0 && config.delete_from_self) {
wreq.disk_available = sreq.potentially_free_self;
scan_work_array(wreq, sreq, reply, platform, ss);
}
#endif
log_messages.printf(
SCHED_MSG_LOG::NORMAL, "[HOST#%d] Sent %d results\n",
reply.host.id, wreq.nresults
);
if (wreq.nresults == 0) {
reply.request_delay = 3600;
strcpy(reply.message, "No work available");
if (wreq.no_app_version) {
strcat(reply.message,
" (there was work for other platforms)"
);
reply.request_delay = 3600*24;
}
if (wreq.insufficient_disk) {
strcat(reply.message,
" (there was work but you don't have enough disk space allocated)"
);
}
if (wreq.insufficient_mem) {
strcat(reply.message,
" (there was work but your computer doesn't have enough memory)"
);
}
if (wreq.insufficient_speed) {
strcat(reply.message,
" (there was work but your computer would not finish it before it is due"
);
}
if (wreq.homogeneous_redundancy_reject) {
strcat(reply.message,
" (there was work but it was committed to other platforms"
);
}
if (wreq.outdated_core) {
strcat(reply.message,
" (your core client is out of date - please upgrade)"
);
reply.request_delay = 3600*24;
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"Not sending work because core client is outdated\n"
);
}
if (wreq.daily_result_quota_exceeded) {
strcat(reply.message, " (daily quota exceeded)");
log_messages.printf(
SCHED_MSG_LOG::NORMAL,
"Daily result quota exceeded for host %d\n",
reply.host.id
);
}
strcpy(reply.message_priority, "high");
log_messages.printf(
SCHED_MSG_LOG::NORMAL, "[HOST#%d] %s\n",
reply.host.id, reply.message
);
}
return 0;
}
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