See https://issues.apache.org/jira/browse/CASSANDRA-7405.
Currently cqlsh's COPY FROM just uses a single-threaded for-loop with synchronous inserts. On Wed, Jul 23, 2014 at 8:09 AM, Jack Krupansky <j...@basetechnology.com> wrote: > Is it compute bound or I/O bound? > > What does your cluster look like? > > -- Jack Krupansky > > *From:* Akshay Ballarpure <akshay.ballarp...@tcs.com> > *Sent:* Wednesday, July 23, 2014 5:00 AM > *To:* user@cassandra.apache.org > *Subject:* CSV Import is taking huge time > > Hello, > I am trying copy command in Cassandra to import CSV file in to DB, Import > is taking huge time, any suggestion to improve it? > > id,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z > 100,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26 > 101,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26 > ---- > -- > -- > > there are ~ 50 K lines in this file , size is ~ 5 MB. > > I have created table as per below: > > create table csldata4 ( id int PRIMARY KEY,a int , b int, c int, d int, e > int, f int, > g int, h int,i int, j int, k int, l int,m int, n > int, o int, p int, q int, r int, s > int, t int, u int, v int, w int, x int, y int , z int); > Copy Command: > > COPY csldata4 (id , a , b , c , d , e , f , g , h , i , j , k , l , m , n > , o , p , q , r , s , t , u , v , w , x , y , z ) FROM 'csldata1.csv' WITH > HEADER=TRUE; > > Issue here is it's taking huge time to import > > cqlsh:mykeyspace> COPY csldata (id , a , b , c , d , e , f , g , h , i , j > , k , l , m , n , o , p , q , r , s , t , u , v , w , x , y , z ) FROM > 'csldata1.csv' WITH HEADER=TRUE; > 66215 rows imported in *1 minute and 31.044 seconds*. > > > Thanks & Regards > Akshay Ghanshyam Ballarpure > Tata Consultancy Services > Cell:- 9985084075 > Mailto: akshay.ballarp...@tcs.com > Website: http://www.tcs.com > ____________________________________________ > Experience certainty. IT Services > Business Solutions > Consulting > ____________________________________________ > > =====-----=====-----===== > Notice: The information contained in this e-mail > message and/or attachments to it may contain > confidential or privileged information. If you are > not the intended recipient, any dissemination, use, > review, distribution, printing or copying of the > information contained in this e-mail message > and/or attachments to it are strictly prohibited. If > you have received this communication in error, > please notify us by reply e-mail or telephone and > immediately and permanently delete the message > and any attachments. Thank you > -- Tyler Hobbs DataStax <http://datastax.com/>
