ace42202df
To be the home of example scripts for scylla-sstable. For now only a README.md is added describing the directory's purpose and with links to useful resources. One example script is added in this patch, more will come later.
83 lines
2.3 KiB
Lua
83 lines
2.3 KiB
Lua
--
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-- Copyright (C) 2022-present ScyllaDB
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--
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-- SPDX-License-Identifier: AGPL-3.0-or-later
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--
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-- Creates simple statistics of the fragments in the sstable
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--
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-- Prints the number of each fragment type as well as the total fragment count
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-- and stats for the partition with the most fragments.
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function new_stats(key)
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return {
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partition_key = key,
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total = 0,
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partition = 0,
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static_row = 0,
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clustering_row = 0,
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range_tombstone_change = 0,
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}
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end
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total_stats = new_stats(nil)
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function inc_stat(stats, field)
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stats[field] = stats[field] + 1
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stats.total = stats.total + 1
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total_stats[field] = total_stats[field] + 1
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total_stats.total = total_stats.total + 1
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end
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function consume_sstable_start(sst)
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max_partition_stats = new_stats(nil)
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if sst then
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current_sst_filename = sst.filename
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else
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current_sst_filename = nil
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end
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end
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function consume_partition_start(ps)
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current_partition_stats = new_stats(ps.key)
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inc_stat(current_partition_stats, "partition")
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end
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function consume_static_row(sr)
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inc_stat(current_partition_stats, "static_row")
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end
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function consume_clustering_row(cr)
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inc_stat(current_partition_stats, "clustering_row")
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end
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function consume_range_tombstone_change(crt)
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inc_stat(current_partition_stats, "range_tombstone_change")
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end
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function consume_partition_end()
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if current_partition_stats.total > max_partition_stats.total then
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max_partition_stats = current_partition_stats
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end
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end
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function consume_sstable_end()
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if current_sst_filename then
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print(string.format("Stats for sstable %s:", current_sst_filename))
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else
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print("Stats for stream:")
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end
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print(string.format("\t%d fragments in %d partitions - %d static rows, %d clustering rows and %d range tombstone changes",
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total_stats.total,
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total_stats.partition,
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total_stats.static_row,
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total_stats.clustering_row,
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total_stats.range_tombstone_change))
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print(string.format("\tPartition with max number of fragments (%d): %s - %d static rows, %d clustering rows and %d range tombstone changes",
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max_partition_stats.total,
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max_partition_stats.partition_key,
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max_partition_stats.static_row,
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max_partition_stats.clustering_row,
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max_partition_stats.range_tombstone_change))
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end
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