Environment

Software: Uniffle 0.2.0 Hadoop 2.8.5 Spark 2.4.6

Hardware: Machine 176 cores, 265G memory, 4T * 12 HDD, network bandwidth 10GB/s

Hadoop Yarn Cluster: 1 * ResourceManager + 6 * NodeManager, every machine 4T * 10 HDD

Uniffle Cluster: 1 * Coordinator + 6 * Shuffle Server, every machine 4T * 10 HDD

Configuration

Spark's configuration

spark.executor.instances 100
spark.executor.cores 4
spark.executor.memory 9g
spark.executor.memoryOverhead 1024
spark.shuffle.manager org.apache.spark.shuffle.RssShuffleManager
spark.rss.storage.type MEMORY_LOCALFILE

Shuffle Server's configuration

rss.storage.type MEMORY_LOCALFILE
rss.server.buffer.capacity 50g

TPC-DS

We used spark-sql-perf to generate 1TB data.

query name	vanilla	uniffle
query1	16	18
query10	30	35
query11	86	96
query12	14	17
query13	102	77
query14a	239	254
query14b	226	232
query15	44	48
query16	50	59
query17	83	97
query18	31	35
query19	15	17
query2	21	25
query20	15	16
query21	8	8
query22	21	22
query23a	288	366
query23b	366	422
query24a	181	198
query24b	167	187
query25	93	113
query26	15	15
query27	16	17
query28	38	41
query29	80	102
query3	9	11
query30	21	26
query31	30	40
query32	14	15
query33	26	30
query34	12	16
query35	34	39
query36	15	18
query37	16	20
query38	27	36
query39	15	19
query39a	16	20
query39b	14	19
query4	205	227
query40	38	38
query41	5	6
query42	9	10
query43	13	13
query44	20	22
query45	30	36
query46	16	18
query47	22	25
query48	25	24
query49	58	66
query5	56	59
query50	56	61
query51	23	28
query52	9	10
query53	12	13
query54	52	62
query55	9	10
query56	25	27
query57	20	22
query58	23	26
query59	22	22
query6	33	41
query60	25	28
query61	25	28
query62	10	11
query63	12	12
query64	176	185
query65	32	37
query66	23	24
query67	697	775
query68	17	19
query69	31	34
query7	17	17
query70	24	27
query71	23	24
query72	335	350
query73	12	14
query74	68	99
query75	58	67
query76	21	21
query77	35	37
query78	151	169
query79	16	16
query8	15	20
query80	146	163
query81	18	26
query82	28	31
query83	21	24
query84	16	19
query85	45	49
query86	14	17
query87	29	37
query88	29	29
query89	11	13
query9	37	37
query90	11	11
query91	17	21
query92	12	12
query93	86	86
query94	40	42
query95	94	94
query96	10	10
query97	29	34
query98	17	21
query99	13	12
total	5821	6494

Uniffle is a little 9% slower than vanilla Spark. Because the amount of shuffle is tiny.

Tera Sort

We generate 1TB data, we use the code of the repo

Uniffle performance

Overall Time: Write Time: Read Time:

vanilla Spark performance

Overall Time: Write Time: Read Time: Uniffle is 30%+ much faster than vanilla Spark when there is a large shuffle.