Re: direct =y in export statement

From: Tom Pall <tom_at_cdproc.com>
Date: Tue, 31 Oct 2000 14:25:22 -0600
Message-Id: <10666.120728@fatcity.com>

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direct =3Dy in export statementIt signifies that the export will be done = directly from the data files directly to the dmp instead of being dragged through the buffer cache. It also means you have to = have the NLS parameters just so,
can't export more exotic objects or column types. Runs many times = faster than direct=3Dn.

Import direct=3Dn means all the above and a lot more. A lot more = caution. When importing with direct=3Dn, indexes are rebuilt after the table is loaded. Constraints are checked = after the tables are loaded. Very fast, lower impact upon the box and the database, high risk for duplicate = rows, constraints which cannot be enabled. When you import with direct=3Dy, you are declaring you don't need Oracle = to do a lot of its usual checking for you.

Original Message -----=20 From: Swapna_P=20 To: Multiple recipients of list ORACLE-L=20 Sent: Tuesday, October 31, 2000 1:20 PM Subject: direct =3Dy in export statement

what does this indicate?=20
what is its significance?=20

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<HTML><HEAD><TITLE>direct =3Dy in export statement</TITLE>
<META content=3D"text/html; charset=3Diso-8859-1" =
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<DIV><FONT size=3D2>It signifies that the export will be done directly =
from the=20
data files directly to the dmp instead</FONT></DIV>
<DIV><FONT size=3D2>of being dragged through the buffer cache.  It =
also means=20
you have to have the NLS parameters just so,</FONT></DIV>
<DIV><FONT size=3D2>can't export more exotic objects or column =
types.  Runs=20
many times faster than direct=3Dn.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Import direct=3Dn means all the above and a lot =
more.  A=20
lot more caution.  When importing with direct=3Dn,</FONT></DIV>
<DIV><FONT size=3D2>indexes are rebuilt after the table is loaded.  =

Constraints are checked after the tables are loaded.  Very=20 fast,</FONT></DIV>
<DIV><FONT size=3D2>lower impact upon the box and the database, high =
risk for=20
duplicate rows, constraints which cannot be enabled.</FONT></DIV>
<DIV><FONT size=3D2>When you import with direct=3Dy, you are declaring =
you don't=20
need Oracle to do a lot of its usual checking for you.</FONT></DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20

style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: = 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">   <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20
  <A href=3D"mailto:Swapna_P_at_satyam.com" = title=3DSwapna_P_at_satyam.com>Swapna_P</A>=20   </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A = href=3D"mailto:ORACLE-L_at_fatcity.com"=20
  title=3DORACLE-L_at_fatcity.com>Multiple recipients of list ORACLE-L</A> =
</DIV>

  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, October 31, 2000 = 1:20=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> direct =3Dy in export=20   statement</DIV>
  <DIV><BR></DIV>
  <P><FONT color=3D#000080 face=3DArial>what does this indicate?</FONT> =
<BR><FONT=20

  color=3D#000080 face=3DArial>what is its significance?</FONT>=20 Received on Tue Oct 31 2000 - 14:25:22 CST