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- 5. _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
-
- This chapter describes the known problems in release 6.5 of
- NFS.
-
- +o NFS UDP traffic currently takes precedence over NFS TCP
- traffic. As a result, sites using a mix of UDP & TCP
- for NFS access might perceive slow performance of NFS
- over TCP. (Bug #571214)
-
- +o There is a known cachefs performance problem. (Bug
- #550268)
-
- +o Ejecting a CDROM can result in a stale NFS file handle.
- (Bug #567372) The workaround is to unmount the CRDOM
- before ejecting the CD.
-
- +o The automounter cannot unmount a file system if its
- file handle is stale. The workaround is to unmount the
- file system using umount(1M) then send the automount
- process a SIGHUP, so that it will update its tables.
-
- Below is a list of known problems or potential problem areas
- with the diskless product.
-
- +o A diskless server must be assigned an NIS domain name,
- even when the server is not using NIS. This means that
- _n_f_s._s_w._n_i_s must be installed on a diskless server. (If
- the domain name appears in the /_v_a_r/_y_p/_y_p_d_o_m_a_i_n file,
- the network startup script sets the domain name when
- the server reboots, even if NIS is not enabled on the
- server.)
-
- +o Occasionally, _s_h_a_r_e__i_n_s_t or _c_l_i_e_n_t__i_n_s_t exit instead of
- resuming after _i_n_s_t exits. If this happens, correct
- the problem in this way:
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- 1. Start the _s_h_a_r_e__i_n_s_t or _c_l_i_e_n_t__i_n_s_t script again.
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- 2. Immediately after the _i_n_s_t menu is displayed,
- type quit and wait for the exit sequence to
- complete.
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- +o The /_u_s_r/_l_o_c_a_l directory has not changed. This implies
- that clients cannot write their own binaries to this
- directory since /_u_s_r is read-only. System
- administrators should determine how they want to handle
- the notion of /_u_s_r/_l_o_c_a_l. To maintain the typical
- model where each host gets its own /_u_s_r/_l_o_c_a_l, make
- /_u_s_r/_l_o_c_a_l a symlink to ../_v_a_r/_l_o_c_a_l. Leaving shareable
- objects under /_u_s_r/_l_o_c_a_l will allow them to be seen by
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- all diskless clients using a particular share tree.
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- +o Likewise, /_u_s_r/_p_e_o_p_l_e is on a read-only partition by
- default. If home directories can be tied to specific
- machines, the /_u_s_r/_p_e_o_p_l_e directory can be replaced
- with a symlink to /_h_o_m_e. However, if home directories
- need to be location transparent, then /_u_s_r/_p_e_o_p_l_e could
- be a large exported partition on the diskless server
- that each client mounts. Alternatively, home directory
- symlinks can point to automounted directories on the
- diskless server. In order to use the standard system
- tools to create new users with home directories not in
- /usr/people, the file /usr/lib/X11/app-defaults/Cpeople
- needs to be modified. The line
-
- ****iiiinnnnttttllll....llllaaaabbbbeeeellll____HHHHOOOOMMMMEEEEDDDDIIIIRRRR:::: ////uuuussssrrrr////ppppeeeeoooopppplllleeee////
-
- can be replaced with something like
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- ****iiiinnnnttttllll....llllaaaabbbbeeeellll____HHHHOOOOMMMMEEEEDDDDIIIIRRRR:::: ////hhhhoooommmmeeee////
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- The guest home directory should move as needed.
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