qa/standalone/scrub: fix "scrubbed in 0ms" in osd-scrub-test.sh

The specific test looks for a 'last scrub duration' higher than
0 as a sign that the scrub actually ran.  Previous code fixes
guaranteed that even a scrub duration as low as 1ms would be
reported as "1" (1s).  However, none of the 15 objects created
in this test were designated for the tested PG, which remained
empty.  As a result, the scrub duration was reported as "0".

The fix is to create a large enough number of objects so that
at least one of them is mapped to the tested PG.

Fixes: https://tracker.ceph.com/issues/71801
Signed-off-by: Ronen Friedman <[email protected]>

Author: ronen-fr

qa/standalone/scrub/osd-scrub-test.sh

@@ -472,7 +472,7 @@ function TEST_just_deep_scrubs() {
     echo "Pool: $poolname : $poolid"
 
     TESTDATA="testdata.$$"
-    local objects=15
+    local objects=90
     dd if=/dev/urandom of=$TESTDATA bs=1032 count=1
     for i in `seq 1 $objects`
     do
@@ -502,6 +502,10 @@ function TEST_just_deep_scrubs() {
     ceph tell $pgid schedule-deep-scrub
 
     sleep 5 # 5s is the 'pg dump' interval
+
+    ceph pg dump pgs --format=json-pretty | jq -r '.pg_stats[] | "\(.pgid) \(.stat_sum.num_objects)"'
+    echo "Objects # in pg $pgid: " $(ceph pg $pgid query --format=json-pretty | jq -r '.info.stats.stat_sum.num_objects')
+
     declare -A sc_data_2
     extract_published_sch $pgid $now_is $now_is sc_data_2
     echo "test counter @ should show no change: " ${sc_data_2['query_scrub_seq']}
@@ -526,7 +530,7 @@ function TEST_dump_scrub_schedule() {
     local dir=$1
     local poolname=test
     local OSDS=3
-    local objects=15
+    local objects=90
 
     TESTDATA="testdata.$$"