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https://issues.apache.org/jira/browse/HIVE-27901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17805914#comment-17805914
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yongzhi.shao edited comment on HIVE-27901 at 1/12/24 7:25 AM:
--------------------------------------------------------------
[~zhangbutao] ;
Hi. I reset _read.split.target-size=67108864. But it's improved a little bit
only, Hive still takes more than 6 times as long as Spark to read the same
table._
was (Author: lisoda):
[~zhangbutao] ;
Hi. I reset _read.split.target-size=67108864. But it's improved a bit, but Hive
still takes more than 6 times as long as Spark to read the same table._
> Hive's performance for querying the Iceberg table is very poor.
> ---------------------------------------------------------------
>
> Key: HIVE-27901
> URL: https://issues.apache.org/jira/browse/HIVE-27901
> Project: Hive
> Issue Type: Improvement
> Components: Iceberg integration
> Affects Versions: 4.0.0-beta-1
> Reporter: yongzhi.shao
> Priority: Major
> Attachments: image-2023-11-22-18-32-28-344.png,
> image-2023-11-22-18-33-01-885.png, image-2023-11-22-18-33-32-915.png
>
>
> I am using HIVE4.0.0-BETA for testing.
> BTW,I found that the performance of HIVE reading ICEBERG table is still very
> slow.
> How should I deal with this problem?
> I count a 7 billion table and compare the performance difference between HIVE
> reading ICEBERG-ORC and ORC table respectively.
> We use ICEBERG 1.4.2, ICEBERG-ORC with ZSTD compression enabled.
> ORC with SNAPPY compression.
> HADOOP version 3.1.1 (native zstd not supported).
> {code:java}
> --spark3.4.1+iceberg 1.4.2
> CREATE TABLE datacenter.dwd.b_std_trade (
> uni_order_id STRING,
> data_from BIGINT,
> partner STRING,
> plat_code STRING,
> order_id STRING,
> uni_shop_id STRING,
> uni_id STRING,
> guide_id STRING,
> shop_id STRING,
> plat_account STRING,
> total_fee DOUBLE,
> item_discount_fee DOUBLE,
> trade_discount_fee DOUBLE,
> adjust_fee DOUBLE,
> post_fee DOUBLE,
> discount_rate DOUBLE,
> payment_no_postfee DOUBLE,
> payment DOUBLE,
> pay_time STRING,
> product_num BIGINT,
> order_status STRING,
> is_refund STRING,
> refund_fee DOUBLE,
> insert_time STRING,
> created STRING,
> endtime STRING,
> modified STRING,
> trade_type STRING,
> receiver_name STRING,
> receiver_country STRING,
> receiver_state STRING,
> receiver_city STRING,
> receiver_district STRING,
> receiver_town STRING,
> receiver_address STRING,
> receiver_mobile STRING,
> trade_source STRING,
> delivery_type STRING,
> consign_time STRING,
> orders_num BIGINT,
> is_presale BIGINT,
> presale_status STRING,
> first_fee_paytime STRING,
> last_fee_paytime STRING,
> first_paid_fee DOUBLE,
> tenant STRING,
> tidb_modified STRING,
> step_paid_fee DOUBLE,
> seller_flag STRING,
> is_used_store_card BIGINT,
> store_card_used DOUBLE,
> store_card_basic_used DOUBLE,
> store_card_expand_used DOUBLE,
> order_promotion_num BIGINT,
> item_promotion_num BIGINT,
> buyer_remark STRING,
> seller_remark STRING,
> trade_business_type STRING)
> USING iceberg
> PARTITIONED BY (uni_shop_id, truncate(4, created))
> LOCATION '/iceberg-catalog/warehouse/dwd/b_std_trade'
> TBLPROPERTIES (
> 'current-snapshot-id' = '7217819472703702905',
> 'format' = 'iceberg/orc',
> 'format-version' = '1',
> 'hive.stored-as' = 'iceberg',
> 'read.orc.vectorization.enabled' = 'true',
> 'sort-order' = 'uni_shop_id ASC NULLS FIRST, created ASC NULLS FIRST',
> 'write.distribution-mode' = 'hash',
> 'write.format.default' = 'orc',
> 'write.metadata.delete-after-commit.enabled' = 'true',
> 'write.metadata.previous-versions-max' = '3',
> 'write.orc.bloom.filter.columns' = 'order_id',
> 'write.orc.compression-codec' = 'zstd')
> --hive-iceberg
> CREATE EXTERNAL TABLE iceberg_dwd.b_std_trade
> STORED BY 'org.apache.iceberg.mr.hive.HiveIcebergStorageHandler'
> LOCATION 'hdfs://xxxx/iceberg-catalog/warehouse/dwd/b_std_trade'
> TBLPROPERTIES
> ('iceberg.catalog'='location_based_table','engine.hive.enabled'='true');
> --inner orc table( set hive default format = orc )
> set hive.default.fileformat=orc;
> set hive.default.fileformat.managed=orc;
> create table if not exists iceberg_dwd.orc_inner_table as select * from
> iceberg_dwd.b_std_trade;{code}
>
> !image-2023-11-22-18-32-28-344.png!
> !image-2023-11-22-18-33-01-885.png!
> Also, I have another question. The Submit Plan statistic is clearly
> incorrect. Is this something that needs to be fixed?
> !image-2023-11-22-18-33-32-915.png!
>
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