Difference between ASCS and CI

Hi Experts,
I am a bit confused with the difference between the terminologies ASCS and CI. With the introduction of ASCS the Message and Enqueue services are separated from CI then why does CI terminology still exists in the installation guide or for that reason why do we still have to install CI in HA set up?
What services will be there in CI with the existence of ASCS? Will the CI still hold Message server and Enqueue server and will be a replica of ASCS?
The simplest HA setup what I understand is this-
Node A- ASCS + CI + DB (With DB and ASCS as SPOFs and clustered)
Node B - DI
So with this when Node A fails ASCS and DB gets moved to Node B and DI on Node B takes the place of CI. But my confusion here is if DI is taking the place of CI then CI and and DI becomes same in the whole architecture. Is it so?
Regards
Sourabh Majumdar

Hi
Here i am pasting my instance Profile details please check it may help you to understant,
more HSP_ASCS01_scsHSP
SAPSYSTEMNAME = HSP
SAPSYSTEM = 01
INSTANCE_NAME = ASCS01
DIR_CT_RUN = $(DIR_EXE_ROOT)/run
DIR_EXECUTABLE = $(DIR_INSTANCE)/exe
SAPLOCALHOST = scsHSP
SAP Message Server parameters are set in the DEFAULT.PFL
ms/standalone = 1
ms/server_port_0 = PROT=HTTP,PORT=81$$
SAP Enqueue Server
enque/table_size = 4096
rdisp/enqname = $(rdisp/myname)
enque/snapshot_pck_ids = 100
ssl/ssl_lib = $(DIR_EXECUTABLE)$(DIR_SEP)$(FT_DLL_PREFIX)sapcrypto$(FT_DLL)
sec/libsapsecu = $(ssl/ssl_lib)
ssf/ssfapi_lib = $(ssl/ssl_lib)
enque/server/replication = true
more HSP_DVEBMGS00_ciHSP
#.*       Instance profile HSP_DVEBMGS00_CIHSP
#.*       Version                 = 000007
#.*       Generated by user = BASIS
#.*       Generated on = 04.09.2011 , 16:55:50
#parameter created                          by: BASIS        04.09.2011 16:55:24
rdisp/gui_auto_logout = 900
#parameter created                          by: BASIS        30.08.2011 16:35:49
login/multi_login_users = BASIS
#parameter created                          by: BASIS        30.08.2011 11:59:06
login/disable_multi_gui_login = 1
#parameter created                          by: BASIS        12.08.2011 17:16:51
abap/buffersize = 1500000
#parameter created                          by: BASIS        12.08.2011 17:14:48
rsdb/obj/buffersize = 75000
#parameter created                          by: BASIS        12.08.2011 17:14:20
rsdb/obj/max_objects = 20000
#parameter created                          by: BASIS        12.08.2011 17:13:37
rsdb/cua/buffersize = 45000
#parameter created                          by: BASIS        12.08.2011 17:13:19
rsdb/ntab/ftabsize = 120000
#parameter created                          by: BASIS        12.08.2011 17:12:59
rsdb/ntab/entrycount = 45000
#parameter created                          by: BASIS        12.08.2011 17:12:42
rsdb/ntab/irbdsize = 8000
#parameter created                          by: BASIS        12.08.2011 17:12:24
rtbb/buffer_length = 60000
#parameter created                          by: BASIS        12.08.2011 17:12:08
zcsa/table_buffer_area = 100000000
#parameter created                          by: BASIS        12.08.2011 17:11:46
zcsa/db_max_buftab = 10000
#parameter created                          by: BASIS        12.08.2011 17:11:23
zcsa/presentation_buffer_area = 35000000
#parameter created                          by: BASIS        12.08.2011 17:10:56
sap/bufdir_entries = 10000
#parameter created                          by: BASIS        12.08.2011 17:10:04
em/initial_size_MB = 9216
#parameter created                          by: BASIS        12.08.2011 17:09:44
em/global_area_MB = 255
#parameter created                          by: BASIS        12.08.2011 17:09:26
*** PERMANENT 701 CHANGE ***"
#ztta/short_area = 4000000
#parameter created                          by: BASIS        12.08.2011 17:08:55
rdisp/max_arq = 2000
#parameter created                          by: BASIS        12.08.2011 17:08:30
rdisp/wp_ca_blk_no = 2000
#parameter created                          by: BASIS        12.08.2011 17:07:29
rdisp/appc_ca_blk_no = 2000
#parameter created                          by: BASIS        12.08.2011 17:07:09
gw/max_conn = 2000
#parameter created                          by: BASIS        12.08.2011 17:06:52
rdisp/tm_max_no = 2000
#parameter created                          by: BASIS        12.08.2011 17:06:35
rdisp/max_comm_entries = 2000
#parameter created                          by: BASIS        12.08.2011 17:06:07
gw/max_overflow_size = 25000000
#parameter created                          by: BASIS        12.08.2011 17:05:30
gw/max_sys = 2000
#parameter created                          by: BASIS        12.08.2011 17:04:11
enque/table_size = 10000
SAPSYSTEMNAME = HSP
SAPSYSTEM = 00
INSTANCE_NAME = DVEBMGS00
DIR_CT_RUN = $(DIR_EXE_ROOT)/run
DIR_EXECUTABLE = $(DIR_INSTANCE)/exe
SAPLOCALHOST = ciHSP
ssl/ssl_lib = $(DIR_EXECUTABLE)$(DIR_SEP)$(FT_DLL_PREFIX)sapcrypto$(FT_DLL)
sec/libsapsecu = $(ssl/ssl_lib)
ssf/ssfapi_lib = $(ssl/ssl_lib)
login/accept_sso2_ticket = 1
login/create_sso2_ticket = 2
exe/saposcol = $(DIR_CT_RUN)/saposcol
#old_value: 10
              changed: BASIS 12.08.2011 17:01:14
rdisp/wp_no_dia = 20
#old_value: 3
              changed: BASIS 12.08.2011 17:01:14
rdisp/wp_no_btc = 6
exe/icmbnd = $(DIR_CT_RUN)/icmbnd
icm/server_port_0 = PROT=HTTP,PORT=80$$
#old_value: 1
              changed: BASIS 02.09.2011 13:10:01
rdisp/wp_no_vb = 2
#old_value: 1
              changed: BASIS 02.09.2011 13:10:01
rdisp/wp_no_vb2 = 2
#parameter created                          by: BASIS        12.08.2011 17:01:27
login/no_automatic_user_sapstar = 0
#old_value: 1
              changed: BASIS 02.09.2011 13:10:01
rdisp/wp_no_spo = 2
#Values proposed by SAP for shared memory pool sizes
#parameter created                          by: BASIS        12.08.2011 17:18:02
*** PERMANENT 701 CHANGE ***"
#ipc/shm_psize_10 = 124000000
ipc/shm_psize_10 = 728000000
#parameter created                          by: BASIS        12.08.2011 17:18:02
ipc/shm_psize_14 = 0
#parameter created                          by: BASIS        12.08.2011 17:18:02
ipc/shm_psize_18 = 0
#parameter created                          by: BASIS        12.08.2011 17:18:02
ipc/shm_psize_19 = 0
#parameter created                          by: BASIS        12.08.2011 17:18:02
ipc/shm_psize_30 = 0
#parameter created                          by: BASIS        12.08.2011 17:18:02
ipc/shm_psize_40 = 266000000
#parameter created                          by: BASIS        12.08.2011 17:18:02
ipc/shm_psize_41 = 0
more HSP_ERS02_ersHSP
SAPSYSTEMNAME = HSP
SAPSYSTEM = 02
INSTANCE_NAME = ERS02
DIR_CT_RUN = /usr/sap/HSP/SYS/exe/run
#DIR_CT_RUN = $(DIR_EXE_ROOT)/run
DIR_EXECUTABLE = $(DIR_INSTANCE)/exe
SAPLOCALHOST = ersHSP
Settings for enqueue monitoring tools (enqt, ensmon)
enque/process_location = REMOTESA
rdisp/enqname = $(rdisp/myname)
standalone enqueue details from (A)SCS instance
SCSID = 01
SCSHOST = scsHSP
enque/serverinst = $(SCSID)
enque/serverhost = $(SCSHOST)
HA polling - Only requireqd for self-control with HA polling
#enque/enrep/hafunc_implementation = script
#enque/enrep/poll_interval = 10000
#enque/enrep/hafunc_init =
#enque/enrep/hafunc_check = $(DIR_EXECUTABLE)/enqtest.sh
Please Check as per my understanding Profile makes differences
Thanks
sadiq.

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1 select count(*)
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where d1 between to_date('01-jan-2001')
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